Tadpole (21 months) loves "Mommy School" time. A few days ago, I made hims a turtle sensory bin with an adult turtle and baby turtle from the Safari Ltd life cycle set. I placed about a half inch of water on the tray along with the turtles. Tadpole jabbered about the turtles (it's a great way to work on vocabulary) and move them around the water. He also loved to splash the water all over himself. A few minutes of set up game me several minutes of happy toddler time.