A roof shingle is like a tiny rectangle-shaped piece of armor that covers the roof of a house. It's often made of a material called asphalt, which is black and has tiny rocks stuck into it. This makes it strong and able to protect the house from things like rain, snow, and even hail. The shingles are put together like a puzzle, with each one overlapping the one below it, so water can't get in. Think of it like a wall of armor that shields your house from the weather!