I liked the design of don_eldarro's "Czech Hedgehog" in that it could be taken apart when not in use, but I wanted something that looked a bit more like the real thing. Getting something that looks exactly accurate with this three piece approach isn't really possible, but I think this gets a bit closer to the source object. 

The STL file contains all the parts needed to assemble the final object. No support is necessary, though you may want to turn on brim if your pieces start to curl up at the ends. Place the two large arms back-to-back, with the L shaped holes aligned; then push the longer end of the tie rod through the middle. The stop in the tie rod is meant to help keep the object together and should be oriented so it points downwards.