During the first part of the activity, which is the design of the machines, tell the students that the following materials will be available for them. Anything else they think of requires teacher approval, for example, dominoes, an egg, a wooden dowel, wheels, etc.

• hot glue
• construction paper
• marbles
• small paper cups (such as Dixie cups)
• paper towel tubes
• string
• jumbo paper clips
• rubber bands
• PVC pipe