How do you make rubber band trolley?

To make a rubber band trolley, you'll need a small lightweight platform (like a piece of cardboard), two wheels (you can use bottle caps), and a rubber band. Attach the wheels to the sides of the platform, ensuring they can spin freely. Then, secure one end of the rubber band to the platform and the other end to a fixed point or a hook on the rear, allowing it to stretch. When you release the tension in the rubber band, it will propel the trolley forward.