Jiji Bobblehead

thingiverse

I reduced the original model by 60% and added a hole designed specifically for a Century Spring Corp. C-582 Utility Compression Spring, which measures 3/16 x 1-3/8 x .016 in (4.778 x 34.925 x .406 mm). To achieve a smooth underside of the head, I had to cut it into two pieces and then glue them back together afterwards. For the entire model, I used 15% gyroid infill, though I probably should have chosen a higher percentage for the head area as it's not heavy enough to bounce effectively. Demonstration: https://www.youtube.com/watch?v=BVzPFqjSAFQ