There are a few things you can do to make your car coaster more fun. One is to add some small rocks or other objects to the bottom of the coaster. This will help keep the coaster moving and make it more exciting for riders. Another idea is to add some small balls or other objects to the top of the coaster. This will help keep riders entertained as they ride. Finally, you can also add some small cars or other vehicles to the coaster. This will give your coaster a unique and fun look.
