Is there any way to get instructions for some old telephone walkie talkies from radio shack? I'm a special ed teacher and these have been in this room for a long time (I would guess at least 20 years?) They turn on but we can't figure out how they work. They are red, shaped like cordless phones, and the model number is 60-4007 thank you! slandrum@newton.k12.ks.us