We homeschool, and my children are part of a homeschool co-op.
I'm currently working on using a BeagleBone Black to build a Jeapardy like game system, for when the co-op does their knowledge bowls, etc. I am going to build the first 'contestant' box and the main box, and do a class for the advanced students where they will help build the rest of the contestant boxes, and then we will both program in the software to support several different game setups, like 2 teams of 5, 5 teams of 2, 5 teams of 2 with a 1st, 2nd, and 3rd order for teams to answer in, in case the 1st team doesn't get it right, etc. At that point, it's just software.
It's a great introduction to simple circuits (each contestant box will have a button and an LED, so power, ground a few resistors, etc), and simple software to read the GPIO pins and set the LED lights.
The co-op gets a cool Jeapardy team setup exactly how they want it, and the students get hands-on experience building it and programming it.
And, they can re-use the BBB for other projects as the students want to experiment with it. It's a flexible embedded computer that they can use for other projects. Just keep a different SD card for each hardware system that they keep.