Why do leaves change color in autumn?

Ever wonder why leaves go from bright green to those CRUNCHY autumn colors? Check out this Summer Leaf; it’s like a tiny factory workin' hard to make food for the whole tree! The secret ingredient is Chlorophyll, which is basically like a big pot of green paint that soaks up sunlight. But when it gets chilly, the tree puts a Stem Seal right at the bottom—it’s like lockin' a door so water can’t get in or out. Without water, we see Fading Green because that green paint starts disappearin'. And guess what? Those Hidden Colors like yellow were actually there the whole time! We just couldn't see 'em behind all that green. Finally, the Red Colors show up because of the sugary snacks trapped inside the leaf. It's like a colorful magic trick! Tiny Concepts.