Click on the links below for my activities! First, have the students explore diffusion with an inquiry activity: Diffusion Inquiry Activity & Vocabulary Study Then, have them investigate what happens to gummy bears in salt water and regular water: Yummy Gummy Bears Osmosis Lab Try the lab out yourself first. It's a matter of personal preference how long you want to leave the gummy bears in water. I chose to leave them in overnight. For your enjoyment: Had anyone tried this? If you have, I would love to see some comments and suggestions below! :)