If you are handy working with wood, here is something that you may consider doing for your kids. I feel it would be a wonderful Christmas gift. If you do, make sure to adapt the project to your child favorite games and activities. You could cut a window to suit the needs of a puppet theater.
I suggest to you a DIY project because Tschutschu by Dominik Lutz seems to be only available in Germany for the moment. This is kind of the ultimate multipurpose kid furniture as it integrated a bench, a train table, and a chalkboard. By standing on a different side, it serves a different purpose. You could fix a wooden train track on the train table. This way, there will be less mess across the home and no arguments with your kid to store the train set.