Here is something you can do with paint samples that you can pick up (free) at any hardware store. I just did a "Activity in a Baggie" exchange and this is the activity I did. (They also have Mickey Mouse cards at Home Depo. that are really cute :))
1. Cut the cards up if there are multiple colors on one card.
2. Get at least 2 cards of each color.
3. Get a variety of colors.
*help you child learn their colors
*sort and categorize
*Play GO FISH or MEMORY or a MATCHING GAME
*practice patterns-children will learn patterns starting in Kindergarten. You can prepare them by learning some basic patterns. ABAB, ABBA, ABC, ABAA, etc.
Tell me what other things you can think of that you could do with free paint sample cards.