I really enjoyed my visit with my (then) 4yo son, but I agree. It's warmingly reverential but almost everything is behind glass. They're computers, they're machines, they can do amazing things just with a screen!

The Centre for Computing History in Cambridge (UK) explains as you go in that says unless there's a sign, you can play with anything you see. There's clearly an expert for each machine, so they are set up with who has games, word processors, educational software, a banking back-office (??), typewriters... so much more exciting. The star exhibit is the megaprocessor https://www.megaprocessor.com/progress.html - which has Tetris hooked up.

Also https://www.rmcretro.com which is very hands on.

I highly recommend following Ken Shirriff on Twitter, some great threads on the work he does to keep machines running at the Computer History Museum. https://twitter.com/kenshirriff