With the Atmospheric Turbo Racer, students will learn about science while having fun. Build and power your own racecar while learning about air pressure. This kit comes with an engine, wheels, gas nozzle, tank and air pump. Fill the bottle with water and pump air into the gas nozzle to power the racecar. Watch how fast your car can go! No glue or batteries required. Assembled Size - 13.7" x 4" x 3.9" Pieces - 21