We found a fun science book when visiting my parents, and it includes a few simple tools for experiments. I didn’t know how much the kids were actually absorbing, but J (the four year old) just gave me a summary of one lesson:

“When there is lots of light our pimples are small, but when it’s dark our pimples are BIG!”

It took me a second to realize he was telling me about our pupils. 🙂