Homemade Marble Run
The inner tubes from paper towel and toilet paper rolls, masking tape, paint, markers, or crayons
The cardboard tubes from paper towel rolls and toilet paper rolls can be used to make great marble runs. Decorate the tubes with paint, stickers, markers, or crayons. Use masking tape to attached them in any direction you like, forming a multi-level structure of any height. The tubes can also be cut in half lengthwise to create open chutes for the marbles. At the bottom of your structure, secure the tubes with masking tape to a large piece of cardboard for stability. To catch the marbles, add an egg carton at the end of the chute. Drop your marbles in the top and watch the fun!