Similar Product Demo Video:

Features:
Theoretically, the cars should go further and faster as you can blow up the balloons, but the air resistance will also become greater. Don’t worry, the kids will figure out the best size of the balloon and make the car run further after continuous trials, and learn more about Aerodynamics at the same time.
Coming with 2 cars, you can have a competition with your child to see whose car can run further, you will have a great time with your child.
Put 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.

Specification:
Material: pplastic
Colour: as picture show(Balloon colour is random picked)
Package size: 23x27.7x13.8cm
Age: 3+ years old

Package contents: 
1 X manual balloon pump
2 X plastic cars
12 X balloons in random colors