Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (2024)

These blue fairy cupcake bath bombs are simply magical! The best part is that you can make them your self with your kids and work in a fascinating science lesson, along with some life skills. Making your own bath bombs is incredibly satisfying and saves you so much money. Plus, you can gift a little magical fairy bath bomb into the day of someone who needs a little magic. How special is that?

Fairy Cupcake Bath Bomb Recipe and Science Lesson

What you will discover in this article!

Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (1)

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Have you noticed we love making bath bombs? Especially with kids? Why? Well let me tell you!

I’ve discovered that one of the ways to empower kids and help them take ownership of their learning is by letting them have some say in the process. This means I need to provide ways of learning that are…. wait for it… interesting! For many kids that means getting hands on and active while learning.

I’m sure you’ve heard it before, but one of the best ways for kids to learn is by having fun and playing. By finding projects that ignite kids passions and creativity we can make lessons fun. And when they are having fun, they are learning in ways that will actually stay with them!

These are the lessons they will remember years from now.

Bath bombs offer unlimited creativity. There is a bath bomb idea for almost any passion, interest or fandom. You simply need to think it, and know a bit of the science and process of bath bomb making, to make it happen.

So far we have made Harry Potter inspired bath bombs, Halloween bath bombs, Dragon bath bombs, Christmas bath bombs and so many more!

This week we wanted a little magic. A sprinkling of fairy dust to make our day sparkle with happiness!

That’s how these blue fairy bath bombs came to be. All it took was a little creativity, a bit of passion and a dash of fairy dust magic.

Making Blue Fairy Cupcake Bath Bombs With Whipped Tri-Colour Icing Soap Topping

This is definitely what I would classify as a more advanced bath bomb making project. But once you start making bath bombs, especially with your passionate, highly creative teens I know they are going to embrace this challenge!

We did a similar bath bomb project when we made our Fiery Dragon Bath Bombs and our Glow in the Dark Cupcake Bath Bombs.

You will make these bath bombs in two stages. The first stage is to make the cupcake bath bomb base. Once this is made and hardened (which takes one or two days), you are ready for stage two. In the second step we make and apply the tri-coloured whipped soap icing and add sprinkles.

One of the things we love about these cupcake bath bombs is that the icing soap is great for cleaning yourself in the tub as it pops off quickly and easily in the water.

Plus they look amazing!

BLUE FAIRY Cupcake BATH BOMB RECIPE

To make 12 regular sized cupcake bath bombs you will need the following ingredients and tools:

1 1/2 cups baking soda
1 cup citric acid
1/4 cup Coconut Oil Epsom salts
1/2 cup cornstarch
1/4 cup Bentonite Clay
1/4 cup coconut oil
2 teaspoons polysorbate 80
1-2 drops of Ocean Breeze scented oil
2-3 drops blue soap colorant
Mermaid sprinkles
1 large mixing bowl
1 microwave safe cup or bowl
Muffin mold
Microwave
Disposable gloves (optional)

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Cupcake Bath Bomb Directions

In a large mixing bowl, add the baking soda, citric acid, Bentonite Clay, Epsom Salts and cornstarch. Mix the dry ingredients together.

In the microwave safe cup melt the coconut oil for a few seconds in the microwave until it is just liquid.

Add the Polysorbate 80, scented oil and blue colorant. Mix together.

Add the wet mixture to the large bowl of dry mix. Mix everything together. You will want to use your hands and may want to use disposable gloves so you don’t color your hands. Make sure you break down all the lumps and it is really well mixed. It will feel like wet sand once it is completely mixed.

If you want a darker color, add 1-2 more drops and mix well. Repeat until you get the color you want.

Using an ice cream scoop or spoon, fill each cavity of the muffin mold. Press down firmly. Add more until the cavity is filled to the top. (Note: in the pictures I used a muffin tin, but I discovered silicone molds work much better).

Set them in a warm, dry place to set up and harden for a minimum of 24 hours. You may need to wait 48 hours depending on your climate. My rule of thumb is that when it is hard to the touch, they are ready. Gently pop each bomb free of the mold once it is hard. You are now ready for icing!

Blue Fairy Tri-Color Whipped Soap Icing Recipe

Now it’s time to whip up some magical soap frosting! You will need the following ingredients and supplies:

1/4 cup clear or white melt and pour soap base
1 tablespoon glycerin
1 tablespoon corn starch
3/4 cup whipped soap base
2-3 drops each of pink, purple and teal soap colorant
Tri-color frosting kit
1 large mixing bowl
3 small mixing bowls
Mixer (regular or hand will work)

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DIRECTIONS TO MAKE WHIPPED TRI-COLOR SOAP BATH BOMB ICING

Add whipped soap base, scented oil and glycerin to mixing bowl. Mix on low speed until fluffy, or about 1 minute.

Melt your soap base in microwave safe bowl in 30-second intervals, stirring after each until melted. Allow to cool for about a minute.

Mix in melted soap base and cornstarch and mix on high speed for 1 minute or until the mixture forms peaks, like when you make a meringue. If your frosting is not stiff enough, add a bit more cornstarch and mix in. Repeat until the mixture is nice and firm.

Divide whipped soap into 3 small mixing bowls and add pink color to one bowl, purple to another and teal to the last bowl. Start with 1-2 drops of color and mix it in. If you want a darker color, add 1-2 more drops and repeat until you get the color you want.

Add one of each color frosting to each of the 3 piping bags. Hold bags together so all sides of the tips meet. Add frosting tip and the coupler.

Holding all three bags tightly in your dominant hand, frost cupcake bombs as you would an edible cupcake. Add a few candy sprinkles for your “fairy dust”. The sugar will easily melt in your warm bath water.

PRO TIP! After 2-3 days, your frosting will harden enough that you can easily remove it from the cupcake and use the soap once you have enjoyed your soak in the tub with your bath bomb!

Make sure you store your bath bombs in an airtight container until ready to use. I recommend using your bath bombs within a few months. After that time you may notice a decrease in the fizziness. But honestly, my kids can never wait that long! Bath bombs are just too much fun!

Bath Bombs SCIENCE Lesson

One of the most fascinating part of making bath bombs is the science! It is a wonderful way to engage even your most reluctant young scientist.

So first up, what happens when you mix oil and water?

I think everyone knows this answer from Kindergarten. The oil floats on the water because it is less dense.

What do you notice about the bath bomb ingredient list? Yup, lots of oil in there.

Now no one wants to have a bath where all the oils and colors float on the top in a layer of colorful scum. Sticking to everything it touches and generally making a big old mess. That’s not fun or relaxing for anyone! So what do we do?

We use an emulsifier known as polysorbate 80. This makes all those oils mix with our bath water turning it a gorgeous fragrant color that we want to relax in!

But what about that Bath Bomb Fizz?

Bath bombs fizz due to an acid-base reaction between the baking soda and citric acid. While in their dry, powdered form they will not react, but the moment you add water… BUBBLY FUN!

That’s why I say it is so important to make and set your bath bombs somewhere warm and dry. Any water exposure, even from humidity in the air, will start triggering a reaction.

There is much more cool science behind bath bombs, but those are a couple of the most interesting parts at play.

I hope you have a magical time making fairy bath bombs!

Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (20)

MORE BATH BOMBS FOR KIDS

Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (24)

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Blue Fairy Bath Bomb Recipe

A magical blue cupcake bath bomb making project

Servings 12

Supplies

Cupcake Bath Bomb Ingredients

  • 1.5cupsbaking soda
  • 1cupcitric acid
  • 0.25cupcoconut oil epsom salts
  • 0.5cupcornstarch
  • 0.25cupBentonite Clay
  • 0.25cupcoconut oil
  • 2tsppolysorbate 80
  • 1-2dropsOcean Breeze fragrance oil
  • 2-3drops blue soap colorant
  • Mermaid Sprinkles

Whipped Tricolor Soap Icing

  • 1/4cupmelt and pour soap base
  • 1tbspglycerin
  • 1tbspcornstarch
  • 3/4cupwhipped soap base
  • 2-3dropseach of pink, purple and teal soap colorant

Instructions

Making the cupcake bath bombs

  1. In a large mixing bowl, add the baking soda, citric acid, Bentonite Clay, Epsom Salts and cornstarch. Mix the dry ingredients together.

  2. In the microwave safe cup melt the coconut oil for a few seconds in the microwave until it is just liquid. Add the Polysorbate 80, scented oil and blue colorant. Mix together.

  3. Add the wet mixture to the large bowl of dry mix. Mix everything together. You will want to use your hands and may want to use disposable gloves so you don't color your hands. Make sure you break down all the lumps and it is really well mixed. It will feel like wet sand once it is completely mixed.

  4. Fill each cavity of the muffin mold. Press down firmly.

  5. Let set for 24 to 48 hours.

Whipped Tricolor Soap Icing

  1. Add whipped soap base, scented oil and glycerin to mixing bowl. Mix on low speed until fluffy, or about 1 minute.

  2. Melt your soap base in microwave safe bowl in 30-second intervals, stirring after each until melted. Allow to cool for about a minute.

  3. Mix in melted soap base and cornstarch and mix on high speed for 1 minute or until the mixture forms peaks, like when you make a meringue. If your frosting is not stiff enough, add a bit more cornstarch and mix in. Repeat until the mixture is nice and firm.

  4. Divide whipped soap into 3 small mixing bowls and add pink color to one bowl, purple to another and teal to the last bowl. Start with 1-2 drops of color and mix it in. If you want a darker color, add 1-2 more drops and repeat until you get the color you want.

  5. Add one of each color frosting to each of the 3 piping bags. Hold bags together so all sides of the tips meet. Add frosting tip and the coupler.

  6. Holding all three bags tightly, frost cupcake bombs as you would an edible cupcake. Add a few candy sprinkles for your "fairy dust".

Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (2024)

FAQs

Do you need citric acid for bath bombs? ›

The key to great bath bombs is citric acid, which isn't hard to find online. There are, of course, alternatives for those with sensitive skin. Citric acid, for instance, can be swapped for lemon juice, cream of tartar, buttermilk powder, or a mix of baking powder and apple cider vinegar.

What makes a bath bomb fizz? ›

Many bath bombs contain citric acid, as found in citrus fruits, and sodium bicarbonate, which is a weak base. The dry chemicals are stable, but in water they react together to produce carbon dioxide bubbles (fizz) and, as a by-product, sodium citrate salt.

Are bath bombs good for your skin? ›

Other additives: The glitter that makes your bath bomb sparkle may be pretty to look at but can also be abrasive to your skin, causing irritation, redness, or increased sensitivity. Bath bombs of all sizes are typically not safe to use.

What ingredient hardens bath bombs? ›

Try adding more baking soda or citric acid to balance it out. If you live in a really humid area, we recommend investing in a dehumidifer to keep things dry while you work. You can also add about 1 teaspoon of kaolin clay per cup of powder. It helps bath bombs harden and hold their shape.

Can I use cream of tartar instead of citric acid in bath bombs? ›

You can adapt most other bath bomb recipes to use cream of tartar instead of citric acid. Just make sure you use half as much cream of tartar as you would citric acid. Too much cream of tartar will make the mixture too thick to stir. Wrap bath bombs in clear cellophane and tie with a bow for a lovely handmade gift.

What does cornstarch do for bath bombs? ›

The reason for using cornstarch or arrowroot powder is to act as a stabilizer for the bath bomb. The presence of this ingredient helps to slow down the rate at which the bath bomb dissolves, causing the “fizz” rate (or the reaction between the baking soda and citric acid) to decelerate.

What does baking soda do in bath bombs? ›

Bath bombs work by combining the higher pH alkali (baking soda) with a low pH dry acid (such as citric acid). When those two ingredients come in contact with water, they produce carbon dioxide, which you see in the form of air bubbles or fizz.

What does coconut oil do in bath bombs? ›

"With these hydrating beauties, bath time will be a sensational affair. Studies show that coconut oil imparts significant improvement in skin hydration and increases skin surface lipid levels. You may also substitute agave necter or mollases if you're a vegan."

What's the difference between a bath bomb and a bubble bomb? ›

Although similar in ingredients and texture, the objective of both products vary. The purpose of the bubble bar is to create mounds of bubbles on top of the water, whereas the bath bomb is designed to fizz under the water whilst also creating mesmerising patterns of colour.

Is it OK to use bath bombs everyday? ›

Bath bombs certainly know how to put on a show in the tub, but don't let the party atmosphere fool you. Daily exposure to their enchanting ingredients, including fragrances, colorants, and essential oils, can be a slippery slope towards developing allergies or sensitivities.

Should you wash off after using a bath bomb? ›

You don't have to shower after using a bath bomb, but you may want to if you've been soaking in a lot of glitter and dye. Simply drain the tub, then take a shower to rinse the oils and butters off your skin. Bath bombs are great for moisturizing, but not for cleaning your body.

Does a bath bomb clean you? ›

While bath bombs offer some cleansing properties and exfoliation benefits, they're not a substitute for a proper shower. If you want to ensure that you're squeaky clean, it's a good idea to rinse off with water and a gentle cleanser after your bath bomb soak.

What three ingredients are needed to create gas from a bath bomb? ›

In bath bombs we bring together a weak acid - citric acid with a pH of 3.2 – and a weak base – baking soda with a pH of 8 to 9. When we drop them into the bath, they react to release carbon dioxide (CO2) gas, which gives us the fizzing that defines the product.

What ingredient makes bath bombs bubble? ›

When a bath bomb comes in contact with water, the baking soda and citric acid react to make carbon dioxide bubbles. This is an acid–base reaction, where baking soda (also called sodium bicarbonate) is a weak base and citric acid is a weak acid.

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