I was recently teaching a group of first graders about the concepts of "strong" and "light" force. They had never been taught these concepts before.

To start the class I wanted to get an idea about what they knew about the concept of force before I started my lesson. I proceeded to ask the class "Where does force come from?" (I was looking for the answer "muscles").

One child piped up with the answer, "GOD". The teachers aid that came to the class just looked at me and asked, "Do you want to take this one?"

Needless to say I moved on to other things!