1513 -
Small Rubber Bands- 1lb 1 pound of #16 rubberbands. These natural rubber bands make the perfect belts (around pulleys) on Easy Engineering projects.
1503 -
Ping-Pong Balls- 6 Pack Ping-pong balls for launchers and other competitions.
Note: These ping-pong balls are American made and much more durable/crack resistant than other brands.
1507 -
Huge Cone of String- 2lbs, 8PLY This is the perfect string for your Easy Engineering contraptions. There might be enough of it in this roll to last you a lifetime.
1509 -
Portion Cups- 4oz- 250 Pack These portion cups work great for launchers, crazy contraptions (Rube Goldberg style machines), and other inventions.
