Perfect for the kindergarten crowd, smoothies are an excellent way to start learning about colors. Grab a bunch of ingredients (standards are orange juice, assorted berries, tropical fruits, and bananas) and lay them out on the counter. Be sure to add in some fun green choices like spinach or kale. Then, let your little one get to whipping and experimenting with color. Have them try to guess what color they will make when they mix different fruits. Try blueberries and raspberries for a striking violet hue. Toss in a little spinach with a mango or banana for a vibrant green. Of course, taste-testing is a must.