Product DescriptionEducational Science Toys: This is a set of aerodynamic vehicles, suitable for children's scientific experiments in aerodynamic knowledge. It would increase children's interest in science and knowledge.Improve your kid's hand-on ability: When children play this DIY toy, they would put a balloon on the car, press to inflate the balloon, press the GO button and let the car run etc. it will improve the child's ability.Easy to start: Three steps gamePut the balloon in the car and fix it. Suction the balloon as much as possible. Press the release button of the air pump to move the car forward.Occasion: Perfect for children outdoor&indoor game, great for party, easter day, Valentina's day, schools, parties - kids, Would make great party favors.Package include: 1 X Cute design pump, 2 X Mini Cars, 6 X Balloon (Color Random)Note:1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures.2. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm)Thanks for your support :)