We have a puzzle of the United States. Each state (other than DE, MD, VT, NH, MA, RI, CT) has its own piece and some are quite small. Julia has come to love it. She asks us to do it with her all the time. So we do, but we put the states in the wrong spots on purpose just so we can hear her say "Dat not where dat goes! It go here!" and then we watch her correctly place it in the right area.
Has been amazing to watch her with the puzzle because she can now do the entire thing herself. Several times in a row and puts them in the correct spot the first time. Every time. Totally amazing.
At least, we think so. Our amazing puzzle girl!