In this game children learn to distinguish colors and systematize objects.
Let’s make heaps of different one-colored objects. For instance, “read heap” consists of ringlets, bricks, red pencils, etc. In the same way, we make a “blue heap” and several other heaps. Now give the baby an object (e.g. a blue ringlet) and ask him/her to drop it to the appropriate heap.
At first, it’s better to start with two heaps, e.g. a read and a blue one. You can also use some pots or truck. Presume we have a red heap in a box, and a blue heap in a big car. When you “create” heaps, comment on every your movement: “This ringlet is red and I put it to a red box, and this brick is blue and I put it to the truck, …” When the kid understands the principle of the game, give him/her a blue ringlet and tell: “This is a blue ringlet and we put it to …” and the blue ringlet will be put in the truck.
When the baby masters the game, you can go on without comments and just lend him/her a red brick and ask: “What heap do we put the red brick?”
If the kid knows many colors, you can make as many heaps and you like. If you know limited colors, you’d better make all the heaps from the known colors and one heap with the objects of unknown color.