Hi! This post goes beyond the basic shapes knob puzzle to outline available sources and brands that sell peg and knob puzzles with realistic photo or imagery. It is by no means extensive but just what I came across and liked while online shopping for puzzles.
I introduced Little P to his first single shaped Montessori puzzle when he was a few days from 10 months old. The first thing he did with the knob puzzle was…. to use it as a pacifier.
Not cool, baby. Not cool.