Where does wood come from?
Where does icing come from?
How do they make paper?
Why isn't white in the rainbow? (then in response to Chad's lengthy discussion of white isn't a color... Then how do you make pink?)
Mom tell me everything you know about cars?
How do you make trees?
Why does the sun have to shine through windows?
What does the top of the car look like when we are driving?
Among others.. hoping Chad chimes in here, he makes us laugh so hard!