It's not every day that your snack doubles as a science experiment! These Jell-O and marshmallow roll-ups are not only sweet, but they're also mesmerizing to watch. When the two treats get melted together, they form a foamy liquid. But as they set, the marshmallows float to the top, creating two distinct layers of Jell-O and marshmallow fluff. Talk about eye candy!

For more fun treats, try our pigs in a bagel [1].