Klutz-Make Your Own Bath Bombs. Transform your bath with fizzy bubbles, fun color and fantastic fragrance! Learn the science behind creating the perfect fizz and make up to ten colorful bath bombs in five different shapes. This package contains baking soda in three colors, citric acid, five plastic molds, strawberry kiwi oil, glycerin and oneinstruction book. Conforms to ASTM D 4236. Recommended for ages 6 and up.