FIZZ bombs

Explore the three states of matter by creating fizz bombs! Fizz bombs (aka bath bombs) are solid. You drop them in a bowl of water (liquid) and produce a bubbly, fizzing reaction (gas)! I, personally, wouldn't take a bath with one, but it makes a fantastic science experiment. The recipe comes from the Fitness Guru (click here for more detailed instructions).

materials:
1 cup citric acid
1 cup baking soda
1/2 cup light canola oil
1/2 cup cornstarch
food coloring (optional)

1. mix dry ingredients
2. mix oil and food coloring in separate container
3. add wet to dry ingredients
4. find a mold to shape them (the fitness guru suggests plastic eggs)

Once dry, drop them in water - solid, liquid, gas!