Each group needs:

• plastic syringes, such as from McMaster-Carr for ~$1.27 per syringe; see note below
• plastic tubing, such as from hardware and pet supply stores for ~$20; see note below
• various wood scraps
• bolts, screws, nuts, washers
• other APPROVED materials
• 1 empty soda can

Note about syringes and tubing: In this activity, all the syringes must be exactly the same and it is important that the plastic tubing fits snugly on the tip of the syringe. A good option is a 50 or 60 cc plastic manual syringe with a tapered tip, such one available from McMaster-Carr—the "60 cc plastic manual syringe with taper tip" for $1.27 per syringe. It may be helpful to purchase the syringes first and then bring one to a hardware or pet supply store to find appropriate sized plastic tubing.

To share with the entire class:

• tape
• 20 x 20 cm piece of wood or cardboard to serve as a wall
• drill (for teacher use or with appropriate supervision)
• saw (for teacher use)
• empty soda can