This lively 50-minute program uses live action, animation, and music to introduce computers to the preschool set. The caper begins when Telly gets an e-mail account and Luis helps him send a message to friends. Several characters, including Sesame Street favorites like Cookie Monster and Oscar, write back--and someone who signs their message, "Your Mystery Friend." Telly has no idea who this could be, so he joins up with Baby Bear and they follow the clues until the mystery is solved. The only segment that doesn't fit the theme is the song "I'm Fixing My Hair," which features children combing and brushing their hair. Computer Caper is an enjoyable look at basic concepts such as the screen, keyboard, mouse and some of the uses to which computers can be applied. It includes a special episode of Elmo's World with Emmy winner Michael Jeter as Mr. Noodle. --Kathleen C. Fennessy