I am always observing the children and the environment. I change it accordingly. I like for everything to flow, not creating a runway. I have a puppet show setup, but did not think of using it as a prop for a store or restaurant. This is great and flexible. I also can bring it out and put it back.
I try selecting high quality material because it last longer, works better and safer, but I have found cheaper items also work and easily replaceable. The children are very difficult on toys and I find it easier to replace them. I really like the idea of rotating materials. There is no need to have all items out at the same time. This enables the children to experiment, explore and have endless possibilities.