George's Expanding Box

prusaprinters

<p>Print three copies of the basic piece, and three copies of its mirror image (I recommend using a different color). &nbsp;No supports are needed, there is a 2 cm bridge at 2 mm height. &nbsp;[To mirror a piece in PrusaSlicer, simply select it and then Mirror → Along X axis.]</p><p>I include the basic piece in two sizes. &nbsp;The large (Unit5.0) version makes a 6 cm cube (~10 hours printing), the small (Unit4.0) version makes a 4.8 cm cube (~6 hours printing). &nbsp;I used 0.2 mm layer height, the movement may be smoother if you reduce this.</p><p>Assemble into a hollow cube (box). &nbsp;This is not easy. &nbsp;Start with 3 identical pieces, and figure out how they go together. &nbsp; Then add the remaining three pieces. &nbsp;Rubber bands may be useful. &nbsp;Please share any assembly tips in the comments.</p><p>After it is assembled grab opposite faces and pull them apart, the box will expand. &nbsp;Push them together, the box will contract. &nbsp;Just don't pull too far! &nbsp;The large box can expand from 6 cm to almost 10 cm.</p>