Valentine-making is underway at my house. I'm using a small plastic cleaning caddy I found at the dollar store to hold all of the art supplies. Easy to contain, easy to transport. Great for houses where the art supplies and/or craft workspace are in different rooms.
I've seen caddies like this in the dollar section at Target as well.
(Keep this in mind the next time you give art or school supplies as a gift…cheaper and more useful than a gift bag.)