water wheel science fair project

this is a water wheel that I made for my science fair project to demonstrate the potential and kinetic enrgy of water.

pices needed:
2x 4mm ball berings
2x 1/2 inch screw

instructions:
1) press 4 mm berings into holes in water wheel holders.
2) insert ends of the rods on the water wheel into the center of the berings.
3) screw the water wheel to a board.