Gather the following materials:
- 1 Small LED (any color will do but I had green on hand).
- Enough small button cell batteries to power your LED.
- 1 Super bouncy ball.
- Electrical tape .
And also fetch the following tools:
- Razor blade.
- Exacto knife (the razor will be fine but the Exacto will help you as well).
- Hot Glue gun (and glue). The hot glue worked OK but you may want to use super glue or epoxy instead.
Keep in mind that you want all your components to be small. You will notice that my LED and battery arrangement fit comfortably inside a 1-inch super bounce ball. You can use larger components but you may need a larger ball to house them all. That said, lets continue.