http://www.abcya.com/keyboarding_practice_2.htm Ideal for kindergarten.  Site gives students practice in typing lowercase letters, uppercase letters, periods, and finally short sentences!  The site aids students in finding the "shift key".  Letters are in random order which builds interest, but the pace may be slow for some.

http://toytheater.com/type/ A simple site to practice typing with the option to change the size, font style, and color.