Make an at home spa with the Make Your Own Bath Bombs kit from Klutz Press. Designed for ages 6 years and older, this kit allows kids to discover the science behind creating the perfect fizz and make up to 12 colorful bath bombs in 5 different shapes. A perfect gift for tween girls. Includes baking soda in 3 colors, citric acid, 5 plastic molds, strawberry kiwi oil, glycerin, and step-by-step instructions.