"I bought a simple, inexpensive flashlight, took it apart, and placed it on the science shelf. Children put it back together like a puzzle through trial and error. Once they get all the pieces together correctly, the flashlight will turn on!
Are you teaching your students about osmosis? Perhaps it is part of your science curriculum, or maybe you want to just do a little experimenting. The Colorful Celery Experiment is the perfect introduction to Osmosis.