There is something magical as the ball spins.
This is my nine-year-old daughter's project--it was her idea, and she did all the work except that I suggested that the water bottle neck adapter as a more secure way of attaching the LED and I cut the neck of a water bottle for her.
Ingredients and tools:
- keychain LED, e.g., this one
- small inflatable ball
- some string
- a stick
Step 1: Tie String
Step 2: Make Bottle Neck Adaptor
Step 3: Attach LED
Step 4: Tape the Other End of the Bottle Neck
Step 5: Variations
My daughter's first design had the LED plugged directly into the bottle valve, and then taped in place. This resulted in a brighter lantern, but my daughter said that the ball softened after a few minutes. I suppose one could glue the LED in place, but then the ball wouldn't be re-usable as a ball. Or maybe some good tape would hold the air in for a while.
With a bigger battery (one could use wires instead of the string, and then attach a battery holder to the stick), this would make a nice night-light.