Age of children 

5

Materials required 

  • One 16 ounce empty plastic waterbottle, preferably with a narrow neck
  • ½ cup 3% hydrogen peroxide
  • Liquid dishwashing detergent (one squirt is all you'll need)
  • A few drops of food coloring (optional – it does make a mess that can stain)
  • One packet of dry active yeast dissolved in about two tablespoons of warm water << Do this before the kids arrive for each session >>
  • A funnel
  • A foil pan with fairly high sides

Time required 

20 minutes