Mixing Colors in a Bag

For this activity you need cornstarch, sugar, water, a ziplock bag, and food coloring. Mix 1 cup of cornstarch, 1/3 cup of sugar, and 4 cups of water. Fill about 1/3 of the bag with the mixture. squeeze the food coloring into opposite sides of the bag, zip it closed, and squeeze to mix. We mixed yellow and blue to make green, and then we mixed blue and red to make purple. It was a quick, fun activity, but O was a little too fussy to really enjoy it :( It was also a great way to reuse the old ziploc bags that I just can't stand to throw away :)