If you like Tim's stuff you can always catch his Novelty Automation arcade over by Holborn. Highly recommended by me at least!
I don't know how good the information transfer was at the London Science Museum way back when I was a kid; I remember excitedly spinning all the little brass handles and pushing the brass buttons on various teak cased devices, but I'm not sure I took much science home with me. Sci Fi, a home computer, and (much later) Bill Bryson's book informed me far more.