Print upside down, no support 100% infill, In this size, on an FDM printer they take under 15 minutes.
The 3MF is the correct size to fit my Rubber Ducky, with a head with of 39mm
I have uploaded the Autodesk Fusion 360 file so you can resize to fit the Toy/Doll/Ducky of your dreams.
The author marked this model as their own original creation.