The Centre for Computing History

The voluntarily-run museum is a bit away from the city centre, but really worth visiting if you play with computers such as:

Punch cards for the IBM computers in the 70s

MSX by Toshiba in 1984

The 'Woz Edition' Apple II GS

NES playing the Super Mario Bros!!

Family Computer we played a lot when elementary school. 

Yet, do not use a laptop too long in the restroom :-)