It's a joyful place with so much old technology yet a refreshingly hands on attitude. I don't think there was a single exhibit that wasn't interactive by one method or another - which really matters when you're talking about technology that is largely at an age where kids are too young to have grown up with so it gives them a chance to play with the predecessors to their much loved consumer hardware - and it gives us adults a chance to do more than just reminisce about the fun days experimenting with emerging technologies.
I'd highly recommend that museum on it's own merit; let alone spending the day exploring the site and Bletchly Park as well.