I got some alphabet fridge magnets for Katie. The first thing she did with them, once she put them on the fridge, was sort them by color. She is very color-oriented (there's probably a more technical term for that) and is always concerned about things in this way. She always gets the pink cup when we have a tea party...I get the white one. She wants the pink or purple option whenever it's available. And she points out the colors of things wherever we go.