A cheeseburger is a kind of sandwich that is made up of a beef patty, melted cheese, lettuce, tomato, pickles and some special sauce, all placed between two halves of a bun.
Imagine you have two play-dough that you flattened out to look like pancakes. You put some yummy meat in the middle of one of the pancakes, then put it on top of the other pancake, and now you have a sandwich made up of two pancakes with meat in between.
Now imagine that the meat is cooked and is made from beef which is a kind of animal that grows up on a farm. This beef is usually round and flat like a little disc. You put it on a hot stove, flip it over until it's cooked on both sides, and then you put a slice of cheese on top.
Next, you add some vegetables that are usually healthy and fresh. A piece of lettuce, which is a leafy green vegetable that grows on a farm. A slice of tomato, which is usually red, big and round and also grows on a farm. And some sliced pickles, which are made from cucumbers that have been pickled in a solution of vinegar, salt, and some herbs.
Finally, you top it all off with some special dressing or sauce, which is usually a mix of ketchup and mustard that makes the burger become even more delicious.
So, when you put it all together, you have a tasty sandwich with a meat patty, melted cheese, some healthy veggies, and some sauce, all in one bun. And that's what we call a cheeseburger!