DIY Medicine ball

Medicine balls are great for working your whole body as a system. It is easy to learn transfer of power while using one of these.

Materials:
1 old basketball
Duct tape
Bike tire goo
Tire patching kit
Sand
Drill
Funnel

Procedure:
1. Drill a hole through the valve on the basketball.
2. Fill the ball with sand using the funnel (a water bottle works well for this too).
3. When desired weight is reached, add a generous amount of goo.
4. Patch the hole with the patch kit and let dry.
5. Duct tape a "+" on the patch and wrap completely around the ball to secure the patch