Shape puzzles

Both models were created with OpenSCAD, exported as STL and sliced with PrusaSlicer.

For the polyominos OpenSCAD minkowski() with a 1mm radius cylinder made all pieces fit easily into the intended positions.

Pythagoras pieces were incorrectly sliced as PLA, but everything was printed with PETG. I used PETG because it is food safe, so should be fine for babies.

Pythagoras square pieces were the first parts I printed with 2 colors on MINI+. It was easy to select the layer for color change in PrusaSlicer.

19-part polyominos puzzle (all free 12/5/2 Pentominos/tetrominos/trominos):
https://en.wikipedia.org/wiki/Polyomino

4-part Pythagorean theorem puzzle:
https://en.wikipedia.org/wiki/Pythagorean_theorem