Christian loves trains and is always asking us to build him a bigger and better train track. There's only so much you can do on those small train tables. Every once in a while the kids get the idea to build their own track system throughout the house. They will use every possible piece they can to make it as long and big as possible.
I don't mind because it occupies them for a long time, gets them out from in front of the TV, and has them thinking creatively.
As you can see, it's the entire length of the hallway and then curves into the living room.