I watched it as a kid, probably 3rd - 6th grade, late 70s - early 80s. Pretty sure it was on PBS, because it wasn’t just action/adventure but also learnin’. Lets see what I remember: 3 kids, probably young teenagers, 2 girls and a boy (I think). One of them inherited an uncle’s print shop after the uncle had disappeared under mysterious circumstances. The kids discover 2 robots in the shop, one is an IBM Selectric with eyeballs, I think the other was a CRT monitor. Eventually, there are aliens, mysteries, and cheesy late 70s special fx.
Please help me remember this show, 'cause my wife thinks I’m nuts.