Cool puzzle, not highest quality pieces
We are really enjoying this puzzle, and learning a lot. The information written on the oceans makes the puzzle more interesting and manageable.The pieces are necessarily very small to match the size of the countries. The bigger problem is that they curl up just a bit, so the pieces don't lie flat as you make the puzzle. This is frustrating, and you don't get that satisfying feeling as you put a piece in, as you have to press it down a few times and it still doesn't quite flatten down. I'm trying covering the finished puzzle with heavy books, but I suspect it's just a problem of cheap glue.Still, I give it four stars since a good world puzzle is very hard to find, and the content is good.