Great tip from Teresa below.

If you’re looking for something fun to do with the kids tomorrow afternoon, the Zweischlingen offers a Kinderdisko from 16:00-18:00. The Zweischlingen is a sprawling restaurant with bar and small theater in the Quelle area. The first Sunday of every month, they hold a Kinderdisko for children. We went last month and Rika loved it. The dance floor was packed with kids (from crawlers to pre-teens).

Entrance is free, parents can order food or drinks.