Step-by-Step Instructions
Steps:
1. Cut the cardboard tubes into various lengths and shapes.
2. Use a craft knife or scissors to cut openings in the cardboard box for the marble run.
3. Arrange the cardboard tubes inside the box to create the marble run, using tape to secure them in place.
4. Use a hot glue gun to reinforce the tubes and ensure they stay in place.
5. Test the marble run by dropping marbles through it and make any necessary adjustments.
6. Have fun playing with the marble run!