Stretch Break for Kids, a software program published by Para Technologies and offered free to any K-12 student, is designed to help kids avoid the kinds of repetitive strain injuries (RSIs) that plague so many adult computer users. The program, which offers a choice of 20 stretching exercises, provides written directions and computer animations for each stretch. Kids choose the stretches and number of repetitions they want to perform, select the desired time interval between stretches, and follow along when Stretch Break appears on the screen. Also included in the program are Ergo-Tips on workstation design, posture, keystroke shortcuts, and techniques for ergonomically safe computer use.
Education World spoke to Dr Karen Jacobs who served as consultant in the development of Stretch Break for Kids. This will take a while to download especially if you’re on dial-up. It’s a tad over 9MB.

Kids and Teens Computer web page design
Teach Me Computers for Kids
HTML Goodies
Brief History of Internet
Intro to Computers
Computer Literacy 101