Edu Science Do & Discover Amusement Park Science Kit Includes 4 balloons, 1 steel ball bearing, a hex nut, a dowel rod, 4 pieces of string, 2 pieces of tubing, 4 washers, 2 water bottle caps, 1 wand, decorative pieces, and an instruction booklet Built models of amusement park rides and learn about the science behind them Fun and engaging activities teach about kinetic energy