Many builders enjoy mounting base plates on walls, but what about something smaller, more planetoid? Imagine several base plates joined together as a cube with a weighted stand. A cube planet that can be built on all sides. This is Anti-Gravity Building.
As a product these could come in different sizes, just like base plates already do. Though, this is something meant to be small enough to sit on the desk of a child or adult, and be fiddled with endlessly. A small size makes it easier to turn and build structures in strange ways that cross sides. As my crude drawings below demonstrate.
Keeping it small also makes sure that anything built on it won't become too heavy. If the planet were to topple it wouldn't be a hazard. This potential would be greatly lessened by a stand that is better designed than what I have drawn. A stand that would offer additional build space!