We did more touristy things in Prague than I thought we would with two kids in tow. On our last afternoon in Prague, we dropped by the City of Prague Museum, which is a nice and quiet place to get away from the cold. The collection is not huge, and you can easily cover the whole place in about 2 hours.
The best part of the museum for us was the children’s section, which had a replica of an old Prague house, magnetic puzzles, puppets, doodling material, soft play area. The boys spent quite a while there, while me and KL took turns going to browse the main exhibits on our own.