Create fun engineering experiments! Simply place supports in the bases, add ramps and complete challenges to discover force and motion, cause and effect and more science concepts. Specially sized to be used on a table top or floor. Set Includes: *3 sturdy bases *3 supports for horizontal or vertical use (11", 13" and 16") *3 ramps (12", 18" and 24") *3 balls (wood, soft foam, and dense foam) *2 carts *5 activity cards *Card stand *Storage bag Ages 3 and up.