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Thirty years ago, Ralph Baer started the video games revolution by patenting
an idea for TV viewers to control a blip of light on screen. The blip became the
bats and balls of Pong, the first home computer game. Now Baer has now come up
with Video Buddy, a video learning aid for children. A fixed blip on the screen
sends data to an optical sensor in a suction cup stuck to the TV screen. The cup
transmits the code to a handheld device, with buttons to press in response to
questions asked in the programme. Bleeps will sound if the child is right or
wrong.