●Build six wind-powered models！
●Make sail cars,sailboats,and more！
●Learn the physics behide how sails and wings work！
● Special designed sail/Low friction wheels/Curved prolate rods/ Hollow tubes.
● Children will understand the principle of kinetic energy and sailing.
● 6 models: sail car, wind catcher car, two kinds of sailboats, wind direction indicator and mini glider.