There's nothing like walking around in the middle of the night and stepping on the knob of a wooden puzzle piece. It kind of hurts. Believe me, it's happened to me on many an occasion, and it has resulted in firetruck and dinosaur-like imprints on my feet.
If you're tired of stepping on puzzle pieces, having puzzle pieces go missing -- and if your toddler is tired of doing the same puzzles over and over -- you may want to consider some puzzle alternatives on the App Store.
While I'm obviously too old to be doing wooden knob puzzles, my 18-month-old nephew isn't. So, these observations are based, in part, on his interactions with the apps and a sit-down we had over a bottle of milk to discuss them.TUAW