My 2-year daughter has just started playing with Play-Doh. I designed a bunch of fun shapes and Montessori shapes too. My wife is a Montessori Teacher and I thought it would be useful during play time.
Related:
Play-Doh/Cookie Cutters Numbers
https://www.thingiverse.com/thing:2771369(#ad)
Thingiverse: https://www.thingiverse.com/thing:2768003