My really good friend learned when she was 7, but she didn't start up again until she was 11. I'd say 10 is a good age for someone to teach you. To learn from a book would be at least 12.
MesaVerde- 13 year old knitter.
Yay teen knitters!
OTN: A hat for me!
FO: Brothers earflap hat, Grandpa's hat, and Lacey scarf.