What you need:
- Potato (the older the better). Look for one that's already started sprouting or has several eyes (bumps that show where the potato is about to sprout).
- 4 toothpicks
- Wide-mouthed watertight container. (Choose a clear glass jar so your children can spot the first rootlets growing.)
Stick four toothpicks around the middle of the potato. The toothpicks should be placed equal distance around the potato, like the spikes of a bicycle wheel. The toothpicks will act as the supports you need to suspend the potato on the rim of the jar.