We have learned how to:
build and modify objects.
how to set permissions enabling selected users to copy and alter those copies, and how to save objects to the inventory.
how to create entire buildings, save them and copy them any number of times to the adjacent or entirely different locations.
We also explored the inventory i.e. learned how to drive a car and access saved, self-made objects. There are build kits with which one can very easily create and modify a building.