In our long line of “magical” science, we introduce the Magic Rollback Can. The Magic Rollback Can appears to be a normal can of coffee or oats, but after you roll it along the ground a little ways and watch it come back, you'll be wondering just how it works.
- Coffee or oats can
- Nail or other hard pointed object
- 9-volt battery or object with similar weight
- Rubber band
- 2 paperclips