This science project will put a bounce in your step. The process involves putting together a ball mold, adding powdered rubber, and submerging the mold in water. In just four minutes, you’re ready to detach the mold and Voila! You’ve made your own hi-bounce rubber ball. Each kit makes two balls. Detailed instruction included. Six kits included.
  • 6 Make-your-own ball kits
  • Each kit makes 2 balls measuring 1" in diameter
  • Includes everything you need. Just add water.
  • Adult supervision suggested
  • Ages 3+