My son is currently into puzzles, and therefore I came across Mudpuppy and found a great selection of not only puzzles but also flash cards and other educational games. They have all kinds of themes, some of them licensed from famous authors like Richard Scarry and Eric Carle. Mudpuppy is part of Galison, originally known for its paper products made for museums. Customers from the US and Canada can order online. All others should send an email.