Looking for naive questions from young children

[nickheap]

I would love to hear some of the lovely or interesting naive questions that very young children ask. My son once asked me "Why are Rhododendrons Red?" and a friend's granddaughter asked "What are humans for?"

The background is that Sugata Mitra (www.ted.com/talks/sugata_mitra_shows_how_kids_teach_themselves?language=en) has shown that children can learn almost anything if asked a good question and have access to the Internet. It works best with four children to a computer so they can talk to each other. I was wondering what would happen if the questions came from children too! Can you help?

It might be fun to publish the best ones here.