If you’re taking a reluctant museum or gallery visitor on your travels in southern Germany, then I wholeheartedly recommend trying the ZKM – Center for Art and Media in Karlsruhe. It’s kind of like a combination between an art gallery, scientific museum and a technology exhibition and it really makes for a fascinating afternoon.
There are fixed and rotating exhibitions which all somehow relate to some artistic expression using technology, and a lot of them include hands-on demonstrations for visitors – no surprise since ZKM also sells itself as the world’s first museum for “interactive art”. When I was there, my favourite exhibition involved a computer projection of bubbles onto a large white wall – visitors could gently push the bubbles around by lining up their shadow on the wall with the bubbles, and if you pushed too hard, the bubbles burst.
Karlsruhe is a nice south-west German stop in any case, if you’re down towards Baden Baden or the Black Forest, so I’d recommend a day or two there. The ZKM – Center for Art and Media is closed on Mondays and Tuesdays, though, so I’d plan around that.