How does a combination of Small pretzels, gold fish, reeces peices, M&Ms, Dried cranberries, cheerios and golden grahams sound? I would get everything at Aldis, Dollar tree, etc for keeping the cost down. I would mix everything up except the reeces pieces and M&Ms and only use them when I know there is no risk of melting. The golden grahams would be a good sourse of carbs. But so would the cranberries