I needed a teaching aid for kindergarten children, to help hold the pencil properly. The hand from jasonwelsh was fine, but it was very uncomfortable to print on the printer and required a lot of gluing during assembly. And I also needed a right hand. I rearranged the objects in Microsoft 3D Builder. It's not perfect, but it works.

I recommend dividing it into three prints when printing.

1. Palm with thumb and first links
2. Second and third finger joints with Skirt
3. halves of ball joints and finger bends

In the pictures, the hand is 60%. For two perimeters and 4 layers top / bottom 0.2 mm. Printed from PLA.

The hand is assembled and the stiffness of the fingers is adjusted with the help of a second glue. It's a bit risky, but it works well. If anyone else has an idea, write. The axis of the finger joints is made of filament.