The realistic photographs have large knobs for little hands to easily grip. With fruit photo knob puzzle, children learn fruit and therefore build vocabulary. It is effective with individuals with Autism as they practice fine motor skills as well while putting the puzzle pieces in place.
The large knobs are perfect for my toddler's grip and she can easily lift each fruit piece. She already recognizes the apple and banana from our kitchen. This keeps her focused longer than any other puzzle we own.
My 3-year-old with speech delays points at each fruit and tries to say the name now, which never happened with our old wooden puzzle. The photos are clear enough that he can tell the strawberry from the cherry, and the knobs are big enough for his little fists to grab without my help.
The knobs are chunky enough that my 2-year-old can lift each piece without me helping, which was the whole reason I bought this. The fruit photos are actual pictures instead of cartoons, so he's already pointing at bananas and saying the word.