Kodama Bobblehead

thingiverse

The human head connects to the body via a pen spring with a minimum inner diameter of 3.2 millimeters and a maximum outer diameter of 6.2 millimeters. The length of this spring is approximately 29 millimeters. To create a rattling effect, add a pebble or two to the head as it prints. Be careful not to overdo it, as too many objects could depress the spring and cause the head to sag. The base remains unchanged except for one crucial modification: cutting off 1 millimeter from the bottom to minimize overhangs.