Increase the air pressure inside the balloon: Inflate the balloon with more air to increase the pressure inside. More air escaping the balloon will generate a stronger force, propelling the rocket faster and farther. However, be cautious not to overinflate the balloon, as it may burst. Use a larger or longer balloon: A larger or longer balloon can hold more air, which means it has the potential to generate a stronger force when the air is released. Experiment with different balloon sizes to find one that optimizes speed and distance. Reduce friction: Ensure that the string or line used for the rocket's path is tight and smooth to minimize friction. Lubricate the straw with a small amount of dish soap or cooking oil to help it slide more easily along the string. Streamline the rocket: Make sure the straw or tube connecting the balloon to the string is lightweight and has a low profile to reduce air resistance. You can also tape the balloon's neck in a straight line along the straw to minimize drag. Optimize the angle: Experiment with different angles of the string or line to find the most efficient trajectory for the balloon rocket. A slightly upward angle may help the rocket travel farther. Use a nozzle: Attach a small nozzle or straw to the opening of the balloon to control the release of air more effectively. This can help direct the escaping air more precisely, generating more thrust and potentially making the rocket go faster and farther. Challenging kids to make adjustments to their balloon rocket design is a great way to learn about the factors that affect the speed and distance of a balloon rocket. Related: Use our scientific method for kids worksheets to test different balloon rocket designs!