Another great game for intelligence and visual and spatial perception is Find the Difference. You probably played this as a kid too, only the pictures were in magazines. While playing this game, your child will learn to focus on details, compare and analyze images.
At first, the images will probably look the same to your child, but explain that there are little differences that they should find as if they were detectives. They will feel like they are on a search, so depending on your child's age, you can even enter a point system for each detected difference or you can time them.
Note: You must enable Flash Player for most of these games if you are using a computer.