Monster Eyes Halloween Bath Bombs

These may be one of the creepiest Halloween Bath Bombs yet! I thought our glow in the dark bath bomb with the surprise inside was shudder worthy, but these Monster Eyes Bath Bombs take it to a whole new level! This is a great bath bomb chemistry project for your tweens and teens.

Monster Eyes Halloween Bath Bombs

Halloween chemistry lesson Bloody Monster Eye Ball Bath Bombs

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Whether you call them bath bombs or bath fizzies, these little balls of bubbly fun are just plain awesome. In the past I always considered them a very special treat. With bath bombs costing $5 to $10 each it made for a very special bath when I could afford one of these little indulgences. Then I discovered the world of chemistry and bath bomb making. Suddenly we could make bath bombs at home. It was a fantastic chemistry lesson for the kids. And I was making them for very little money.

So what is so great about making bath bombs with the kids?

My kids are learning and having fun.

Chemistry is interesting and exciting with such a practical, hands on project.

My tween and teen boys are crafting and creating.

They make amazing gifts that everyone loves.

The creativity is endless. We’ve made mermaid and superhero bath bombs, plus Harry Potter bath bombs and Dinosaur bath bombs.

There is really no reason not to make bath bombs with your kids. It’s a win-win!

Monster Eye Halloween Bath Bombs

Getting Spooky For Halloween With Bath Bombs

Now it’s no secret around here how much we love Halloween. Each year we have a lot of fun coming up with new and exciting ideas for this season. But this monster eye ball bath bomb? I think it takes the cake. It is so creative and fun, yet also shudder worthy. Perfect for Halloween!

Bath bomb making is a great activity for tweens and teens, or older kids with adult supervision. With this activity we are also making some soap, so the ability to safely use a microwave is also important.

A note of caution: When mixing the dry ingredients they can become airborne, so I recommend doing it in a well ventilated area. If you have any respiratory issues, consider wearing a face mask. The citric acid is considered a very mild acid, but it still can be a mild irritant for some people who are more sensitive. I am very sensitive (with extensive allergies… yeah redhead!), and as long as I am in a well ventilated area I am fine. I also find if I am making them myself very little becomes airborne. There is just something about the way kids add the ingredients to the bowl that seems to send some of it airborne.

Chemistry Halloween Project Monster Eye Bath Bombs

Monster Eye Ball Halloween Bath Fizzies Recipe & Supplies

2 cups baking soda
1 cup citric acid
1/2 cup cornstarch
1/4 cup cream of tartar
1/4 cup fine Epsom salts
1/3 cup coconut oil
1 tablespoon polysorbate 80
10-20 drops Cedarwood essential oil
10-20 drops Lavender essential oil
Coloured mica powder if desired
Plastic eyeballs
Bath bomb molds
4-5 cubes of clear melt and pour soap base
Red soap color
Spray bottle filled with rubbing alcohol
1 large mixing bowl
2 small bowls
Spoon or whisk

Milliard Citric Acid 5 Pound - 100% Pure Food Grade NON-GMO Project VERIFIED (5 Pound)Polysorbate 80 (Solubilser) 125 gramsMica Powder Pure 23 Color(Total 230g) - Epoxy Resin Color Pigment with Spoon - Cosmetic Grade Slime Pigment for Resin Coloring Soap Making, Natural Epoxy Colorant for Paint,Art,Bath Bomb - 0.36oz EachPlastic Eyeball | Family Friendly Halloween Decor30PCS- Bath Bomb Mold Kit, 15 Set 3 Size Mold & Bath Bombs Press for DIY Making Supplies2lb Clear Stephenson Melt and Pour Soap Base (Crystal ST)Bath Bomb Mold Set with Soap Dye Bath Bomb Kit Soap Colorant for Bath Bomb Making Supplies with(12 Colorants; 8 Molds ; 50 Shrink Wrap Bags; 3 Spoons; 1 Brush)

How To Make Monster Eyes Halloween Bath Bombs

In a large mixing bowl, add the baking soda, citric acid, cornstarch, cream of tartar and Epsom salts. This is the step when things can get airborne.

In a small mixing bowl combine coconut oil, essential oils, and polysorbate 80. Coconut oil binds all the ingredients together, so your bath bombs don’t crumble when you touch them. Polysorbate is an emulsifier that helps mix the oil with the water. Something oil and water don’t naturally do. If you don’t use Polysorbate 80 the oils will float on the top of your bath water and stick to the sides of the tub rather than mixing in nicely.

Add oil mixture to the dry mix in the large bowl.

Mix the ingredients together. I use my hands to break down any lumps and make sure everything is really mixed in there. The mixture is perfect when it holds together when you press it into your hands and feels like wet sand. If you want to have colored bath bombs, you can add your mica here.

Take one bath bomb mold and place an eyeball, printed side down. Hold the eyeball with your finger while adding the bath bomb mixture. Fill until it is a bit over-flowing. Fill the other side of the mold. Press both sides together, using a twisting/grinding motion to get rid of any excess mixture.

Gently tap each side and carefully remove the bomb.

As you progress through making the bath bombs, you may need to spray your mix with the rubbing alcohol to moisten them so they bind together. Just do this very sparingly. Too much moisture and your bath bombs will prematurely erupt.

The Blood Soap Making Step

Place soap cubes into a microwave safe bowl and melt for 30 seconds and stir. Continue to melt in 30 second intervals until completely melted. Add red coloring and mix until the desired color of blood. Add glitter if desired. Mix well.

Using a condiment (squeeze type) bottle or spoon drizzle the soap over the eyeballs to give the effect of dripping blood.

Leave bath bombs to harden. Depending on your climate this could take 24 to 48 hours.

Once hard, store in an airtight container until ready to use. To use them, simply drop it into the bath tub and watch the fizzy fun!

The fizziness of bath bombs or bath fizzies decreases with age. The sooner you use them, the better. I would recommend keeping them no more than a week or two before using them.

Want more Monster Eyes fun? Check out our Monster Eyes Soap making project or our delicious Monster Eyes Truffles!


The fizzy fun of bath bombs is thanks to a simple acid base chemical reaction. In this recipe our base is baking soda and we have two acids: citric acid and cream of tartar. When dry these two chemicals don’t react, but once water is added it activates the reaction. The bubbles are created by the release of carbon dioxide (CO2) during the reaction.

Another interesting science facet of this bath bomb activity is the role of polysorbate 80, an emulsifier. As we know oil and water do not normally mix. Polysorbate 80 plays an important role as it helps the coconut oil and colours in the recipe mix with the bath water, creating a much nicer bath experience.

Monster Eye Halloween Bath Bombs For A Spooky Chemistry Lesson


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