- storage box with a clear or see-through lid and/or bottom
- white Christmas lights
- transparent or translucent, colorful manipulatives (for example, I used some of my old overhead projector teaching materials like counters, coins, and geometric shapes)
- Put the Christmas lights in the storage box.
- Set the box clear-side-up. For us, this meant turning the box upside down.
- Plug in the lights if they're not battery operated.
- Play with the manipulatives on the box! That's it!