Complex House w/ Removable roof and working door

I made a house for the Kids Country class that has a separate roof for putting little items in and a second floor along with a door that works on a hinge like mechanism that I designed.

It was made in Tinker cad and can be found by searching, Kids Country House.

You can see how I made it on YouTube @ http://youtu.be/cVDq5HWmDHg