The sciencewiz collisions & trajectories kit combines cradles, catapults, and collisions with pendulum art to explore the science of motion. Learn about elastic and inelastic collisions, kinetic and potential energy, momentum, circular motion, and pendulums. You'll explore collisions with a newton's cradle, build and aim a catapult, lift off with stomp rocket science, collide collision cars, ram barriers with marbles and carts to explore momentum, paint with pendulums, and more. This kit includes a beautifully illustrated 36-page science book with materials for 18 exciting projects. Recommended for 1 player, ages 8 and up. Made in China. Package dimensions: 10. 250 x 8. 125 x 1. 500 inches. Includes newton's cradle, parts to build catapult and stomp rocket including protractor and rocket cutouts, 3 long plastic rocket tubes, 1 short rocket tube, 3 elbow connectors, 30 craft sticks, 12 rubber bands, parts to build two collision carts, small box for cart, 1 ping-pong ball, 2 marbles, water balloons, 36 page book. Learning Skill: Science Recommended Ages: 8 Years And Up Measurements: 10.25 Length/Inches Assembly: Assembled Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 15.0px Calibri; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} WARNING: CHOKING HAZARD – small parts. Not for children under 3 years.