Little Tikes Dinosaur Pool/Sandbox plug

thingiverse

We have an old Little Tikes dinosaur pool/sandbox that we keep around for the animals. The plug was lost a long time ago and if we used a sink stopper, the animals would either knock it out or remove it as a toy. So I designed and printed this and it works fairly well. The only other thing to note is that I put a 27x28x2mm EVA gasket around the stopper. The coupler could probably be siliconed or glued in but isn't needed for my purposes. It was made using the OpenSCAD threads library by dan_kirshner found here http://dkprojects.net/openscad-threads/ or here https://www.thingiverse.com/thing:1938150 The SCAD file for generating this is included but the threads library must be downloaded and set up separately. To use, one half the coupler, the half with the larger hole, goes under the hole, the other over the hole and they are screwed together, clamping the plastic between them