A door in the playground that will transport you to another part of the playground, a separate mini playground or even another existing playground (like how you can create a link in a powerpoint to open another powerpoint).

This would be useful when building, if you find you need extra room but don't have the physical space, you can just hop to a new area, and therefore you don't have to build up or dig down to create the space. It would also be useful if you want different settings in parts of your playground, for example, night in one part but day in the rest. It would also be useful if you find that your student needs to review something, or do a little more work on something, they could just hop to the review section, and therefore not every student has to do the review if they don't need to. I can think of several examples in my recent pgs when this feature would have been useful.