I don't have any kids myself, but I do have some funny stories about my sisters and I when we were little.
4-year-old me once approached a heavily made-up lady in the church bathroom and asked her, "Are you a clown?" Annoyed, she replied "No, do I look like I clown?" I responded "Yes." My mother, who was in a stall and unable to do anything, was naturally mortified (yet highly amused!).
Little Sis was born in January, so when she saw snow the following winter she didn't remember it at all. She was looking out the back door one day when it started snowing. She gazed up at the sky and whispered "Crumbs..."
My family was at an art museum. Baby Sis, who I believe was about 6 at the time, saw a woman gazing motionlessly at a painting. "Mommy," Baby Sis whispered, "is that lady a statue?" "I don't know," responded our mom, "why don't you go ask her?" So she did! And the lady apparently said nothing, which convinced Baby Sis that she was indeed just a piece of artwork...
Whenever Baby Sis didn't want to do something she was asked to do, she responded "I can't. I have 10 broken legs."