A lease is like borrowing a toy from a friend. You get to play with it and have fun, but you have to give it back after some time. Just like when you borrow the toy, you promise to take care of it and return it without any scratches or missing pieces.
Imagine you have a special puzzle. Your friend wants to play with it, so you both agree that they can have it for a week. During that week, your friend is responsible for keeping all the pieces safe and making sure nothing gets lost. After the week is over, your friend gives the puzzle back to you, just like when a lease ends.
Think of a lease like a library book. You borrow a book, read and enjoy it, but you know you have to return it by a certain date. If you keep it in good condition, the next person can enjoy it too. A lease is a grown-up way of borrowing things like houses, cars, or even big machines, where you agree to take care of them and give them back later.