double square puzzle

Ok, this one is a lot easier than the triangle one. I promise. It's the same idea though: fit the pieces into the square cutout. One of the pieces has a cutout for a small square piece. The easy way to solve this puzzle is to solve it with the little square piece inside the other piece, however if you are clever, you can also solve this puzzle such that you leave the hole in the puzzle piece empty and still get all the pieces to fit into the same cutout. Enjoy!