When kids are searching for pieces and trying to figure out where they go, they are absorbed in their learning. I found this method works as a great teaching tool for kids that have trouble concentrating on homework. I like the Ravenburger puzzles because they are solid. I will tell you, they are a bit more expensive than regular flat puzzles, but, personally, I thought they were worth the extra money. The cheapest ones I found were on Amazon.
I bought the USA map recently for a tween gift. He loved it and so did his parents! The link below is to the one I ordered on Amazon. But, as I always recommend, find the best price and seller, then buy it there.