Make your own air-powered car and understand the fundamentals of motion! Smartivity projects are designed to help children learn the skills required for success in real life, and all-around development. Introduce children to action-reaction pairs, pneumatic power, and motion and thrust. Kids can lay out the tracks they have built, change track length, and adjust the gradient/slope. Learn the concepts of friction and braking using the breakers on flat tracks. Alter the adjustable gradient notches to understand power variations required to climb an incline. Can be painted or colored once assembled. Contains 120 pieces including air-pump and balloons, engineered wood components, and step-by-step instruction booklet. D.I.Y. time: 40 minutes / Play time: unlimited. Age 6 years and up. Meets all ASTM, US CPSC, and CPSIA safety standards.