Kids who have visited their local public libraries see and use computers there. My daughter's school has just been wired for internet access and they are beginning to use the computer there. She had a computer in her kindergarten class where they played educational games to learn the alphabet, spelling and math. Bring old CD-ROM disks and explain to them that an entire encyclopedia is contained on one little disk. Pass them around, let them keep one.
Kids love something they can touch.
Bring a palm-pilot, cell phone, beeper to let them know we are connected to our firms and the information highway. Use a laptop or power point demo. Just my two cents. . .