It's funny, but to relax I was reading Tim Berners-Lee's FAQ for kids. He has a section about "I'm interested in Math -- what exciting stuff is there we don't do at school?". He quickly sketches out what ideas might get us to Maxwell's Equation, ironically enough. But, what a joy it is to see a person who believes in the public domain, and who we have everything to thank for right now, saying "The main thing is, to have fun."