by gringer, published
Don't know what to do with that non-existent spare filament lying round? Try making a stethoscope!
Print stethoscope.stl, join bits together with your filament. There are two holes on the stethoscope body for filament, and one hole in each of the ear buds.
note: This toy does not seem to function as a real stethoscope -- I have not successfully heard my heart beat or breathing while using it. But if you want to try, print with at as high an infill as you can stand (e.g. 90-100%).