Here are the answers provided by my 3 sons:
Logan (7, 2nd grade): "Because I have to learn so that I am smart."
Braden(5, K): "Because I need to learn so I can be better at reading and coloring and staying in my lines. I need to work hard, hard and hard on studying."
Kayden(3, Pre): "Because I want to with my lunchbox."
**Mom's note** WOW! I must say, I was suprised that my middle son had so much to say about school. I asked each of them individually, so it wasn't like they heard eachothers' answers.