Age Range: 6–12 years
Difficulty: Hard

Description:
Build a custom marble run from cardboard tubes and boxes. Design it for speed or twists!

Materials Needed:

  • Cardboard boxes

  • Paper towel tubes

  • Tape

  • Scissors

  • Marbles

Instructions:

1. Cut and tape tubes to form ramps and tunnels.

2. Attach to a cardboard backing or wall.

3. Test and redesign for fun!

Educational Angle:
Builds engineering skills and problem-solving.