DIY Dinosaur Bath Bombs

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These dinosaur bath bombs are a fun DIY craft project that’s easy to make and super quick. You only need a few ingredients to make these fun and relaxing bath fizzies.

DIY Dinosaur Bath Bombs

DIY Dinosaur Bath Bombs


  • 1/2 cup baking soda
  • 1/4 cup citric acid
  • 1/4 cup corn starch
  • About 1-2 teaspoons of oil (I used olive oil, but coconut oil or almond oil are good too!)
  • Small spray bottle of water
  • A few drops essential oils
  • A few drops green food coloring or soap dye (too much and you’ll dye your hands, your bathtub, and the skin of every person you’ve ever loved…)

First gather your materials.  Since my dinosaur sandwich cutter / cookie cutter mold is fairly small, I used half the recipe that I did for some previous bath bombs.

Ingredients for the dinosaur bath bombs

First add your baking soda to a large mixing bowl.

Adding baking soda to a mixing bowl

Next, add the corn starch.

Adding corn starch to the mixing bowl

Then add the citric acid. This is necessary in this particular recipe in order for the bath bombs to actually fizz up in the bath.

Adding citric acid to the mixture

Thoroughly combine all the ingredients so there’s no clumps.

Combining the ingredients

Next you can add a few spoonfuls of oil for your skin (since this is going in a bath), essential oils for scent and wellness benefits (I used Lavender essential oil), and food coloring if desired.

Olive oil and lavender essential oil

Slowly add the oils and food coloring into the dry ingredients. If you add too much, the citric acid will start fizzing. Combine well until the powder is all dyed green (or whatever dinosaur color you chose). You may have to smash the oil into the powder a little bit to get it to mix together.

Adding the oil and food coloring to the dry ingredients

Next grab your spray bottle of water and give it a few sprays. Not too much at once or the citric acid will fizz! Just a little at a time mixed in until you get the consistency of damp sand.

Mixing together the wet and dry ingredients

Grab your dinosaur mold or cookie cutter and firmly pack the bath bomb mixture into the mold like you were packing brown sugar into a measuring cup.

A dinosaur cookie cutter with the bath bomb material

The mixture will expand a little bit as it dries, so make sure you pack it down well. You may need to scrape a little off the top so the details show better if your cookie cutter or mold is made like mine is.

Packing the bath bomb material into the mold
Drying out the bath bomb material in the mold

Let dry for several hours or preferably overnight and pop the dinosaurs out! Ta da! Keep them in a dry place until you use them. To use, simply drop one into a warm bath and it will start fizzing and dissolving instantly.

The finished and dried dinosaur bath bombs

Good luck!

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