One day, I will open a visitor attraction, which will contain two sorts of things.
1. Displays of ordinary items from within living memory. This ensures hours of fun for parents and grandparents going "Oooh, we had one of them!"
2. Lots of sturdy push buttons, levers, turny wheels etc. Some will do something mildly educational, some will just light a light, some won't do anything. But kids will have a ball pushing/turning them anyway.
The cafe will, of course, be reasonably priced - sandwiches at supermarket prices, a quid for a pot of tea, lots of CAEK!