Being the Geeks that we are, we find it interesting to observe the difference in developmental abilities in our little puzzlers. Emma has begun to "see" jigsaw puzzles spatially. She also understands doing the edges first. Lubby...yeah...not so much! He enjoys putting two pieces together outside of the puzzle frame. This drives his sister crazy. I think that's why he does it! HAHA! Oh, siblings...funtimes! Nobody pushes your buttons better.