Car Race Balloon

We are making eco-friendly energy toy cars propelled by a balloon. This way we can improve our creativity as well as reducing the risk and expenses of buying toys in the mall during this pandemic. We used recycled materials such as cardboard, bottle caps, drinking straws and skewers for the car. From our experiments, we observed that bigger wheels helped the car move in a straighter direction. Lighter materials make the car go faster. Bigger straws make the car go faster as more air is released, therefore giving the car more energy. A bigger balloon will make the car travel further as it holds more air. In this experiment, we learnt about energy. When we blow air into the balloon, energy is stored in the form of stretched rubber and air inside. So when we release the balloon, this energy is changed into kinetic energy. As Newton tells us about the laws of motion, “for every action there is an equal and opposite reaction”, so as the air gets out of the balloon, it pushes the car to move forward.