Batty 3D Block Zoo

I was inspired by the 3D Printing Professor's first 3D Block Zoo entry:
http://www.thingiverse.com/thing:1927926

Of course, I wanted to do them in FreeCAD instead of Tinkercad.

You can watch a video of my designing this toy at: https://youtu.be/HgQeDQ8pe0M

I would suggest printing with supports, 10% infill, 0.2 mm layer height.

I am using the new version of NetFabb to check my designs. I'm not sure
that they all needed to be repaired, but I checked the automatic repair
option for