Hanover itself is fascinating, although I really only had a brief time to explore.
One thing I had noticed through Mongolia, Russia, and Finland was that the kids I saw didn't really play much in the snow. I saw the occasional kid with a sled, but hardly any snowmen and I hadn't seen evidence of a single snow fight at all! Even the parked cars all covered in snow were left unmolested by kids who might otherwise be drawing or writing snow graffiti. I could barely resist the temptation to draw a giant smiley face on every snow-covered windscreen I walked past, how did these mischievous kids hold back their urges? It seemed unnatural. I guess they get so much snow that there's no novelty factor to it.