The Answer.

Also, just having fun trying out a some 3D CAD and printing ideas. More versions on the way.

This one : 42 Rotation (print in place)

Five rotating rings, each of which holds a "puzzle piece," show the Answer in silhouette when rotated into the correct position. The effect is difficult to photograph, but easy to see in the print.

OnShape 3D CAD files :

https://cad.onshape.com/documents/ef0e7031d7c44bd0c9cbd602/w/ff6e0cec2fc09e0b13bc9cef/e/57d5643daf20141372517250

Print instructions

Print in PLA using the 3mf file provided. Otherwise :

• 10% rectilinear infill
• perimeters = 2

The model must be oriented properly on the build plate, with the proper flat side down (that is, all of the "puzzle pieces" on the bottom). In addition, I oriented the model at a -45 degree Z angle so the tops would print a bit better.