The tissue box by Mia and Griselda

     The tissue box is was able to move because the wheels did not had to much procedure in each other. Another reason on why the tissue box move was because of its weight since the car was so light the air that travels inside the balloon let the air come out at a good pace. If the tube is too big then more air will come out too fast and your car won't go that far. Also the car was not that small because if it was too small then the balloon will bring down the car. Lastly the reason why wheels were straight. If they are not straight the car will go to the left or to the right.