Kids

BBC Education - Dynamo
Packed with fun interactive games and activities for 5 - 9 year-olds to help with literacy, numeracy and science, plus advice, support and information for parents.
http://www.bbc.co.uk/education/dynamo/home.shtml

Play Guitar
Learn to play guitar in a responsible way, all by yourself.
http://www.nl-guitar.com/pgindex.htm

Quiz Hub
Online interactive learning games, puzzles, and quizzes. Some content is free, but most of it requires a fee to access. Flash player required.
http://quizhub.com/quiz/quizhub.cfm