Thinking about energy

"I bet we could study energy our whole entire life and still not know everything there is to know about energy!"

We've been studying energy as our science topic for months now. I started out by asking "What is energy?" They thought it was kind of a silly question ... until they had to answer. We've been trying to answer that questions ever since.

This is exactly where I want the children to be when we end an investigation of any kind-- realizing just how much more there is to know.