The file 'Castle Tower With Duplo Compatible Bottom 3D Printer Model' is (stl) file type, size is 158.2KB.
This is a combination of http://www.thingiverse.com/thing:183281 and http://www.thingiverse.com/thing:15944 to create a castle tower that connects to duplo blocks.
Tested on Makerbot Replicator 2 with raft and supports.
castleDuplo.stl | 370.8KB |