Bible Kids Fun Zone - a variety of activities.
Aunt Annie's Crafts - projects to do (adult help needed).
Drew's Animals Pictures, Games and other things.
FunBrain - "Interactive, educational games (math and grammar) for kids and children of all ages."
Professor Bubbles' Official Homepage - everything you wanted to know about making bubbles (adult help needed).
Shape N Race Derby Page - "Christian Service Brigade's gravity-powered model car race." (ala Pinewood Derby)
Segmation's SegPlay - Paint by numbers online, many detailed images.