Some friends of ours found tadpoles in their pond and gave us a jar with a few of them. Stephen really liked having them around and it was fun to talk about how they grow and develop.
Kristy found out that tadpoles eat boiled lettuce, so she made some and we fed them. They seemed fairly happy and were starting to grow their legs. However, the jar was getting cloudy and rather than figure out how to change their water, we decided to release them into the pond at the local park.