Ages 5+
Ages 5+

Planet Bath Bombs


What you get

Dive into kid-friendly chemistry with a set of planet-themed bath bombs you crafted yourself! Mix together citric acid, baking soda, cornstarch, and food coloring to make a variety of colorful bath bomb powders. Use a set of molds to shape the powders into multi-layered bath bombs inspired by the layers of the Earth. Then drop your bath bombs into the water to see a frothy, fizzy chemical reaction!

One project can make 3-6 unique bath bombs.

As seen on: Red Tricycle


the Crate Challenge



From the desk of the product designer:

Behind the design

We wanted to make the bath bomb experience more educational. Now kids can learn about the anatomy of a planet while making their bath bombs, from core to crust!
- The KiwiCo Product Design team

By the numbers

Planets created during testing: 67

Planets cut open: 51

Test baths: 4

Additional details

Shipping info



7 reviews

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Mar 22 2021

My granddaughter is obsessed with Bath Bombs and she loved receiving these for Valentine's Day! She wants to make more to enjoy in her bath!

Feb 3 2020

It had them thinking about planets. It was hands on and kept them interested for a long time. It makes bath time easier!

Jan 17 2020

The kids loved the whole thing! Bath bombs are one of their favorites right now.