Advice for my nephews?

I went home for Xmas and my nephews are getting into computers (mainly playing runescape on-line). I left the older one with a copy of Lutz 'Learning Python' and installed it on his desktop and showed the younger one how to make a simple html page and sent him a copy of 'A Kid's Guide to Creating Web Pages for Home and School' via amazon. you can't force anyone to be interested in a subject but i figured i'd open the door - this probably would have been enough for me at their ages. what would you have done?