Pretend your favorite toy box is limited. This means there is only a certain number of toys inside, and you can’t just keep adding more and more toys without taking some out. It’s like when you have a cookie jar and there are only 5 cookies inside. If you eat them all, the jar is empty until someone puts more cookies back. The number of cookies is limited, just like the toys in your toy box.
Think of a playground where only a few kids can play on the swings at a time. If there are already five kids swinging, you have to wait for someone to finish before you can have a turn. The number of kids who can swing at one time is limited. It’s like taking turns because everyone wants to play, but there’s only so much space.
Imagine you have a drawing book with only 10 pages. You can draw on each page, but once you use them all up, you can’t draw any more unless you get a new book. The number of pages you have is limited, so you have to think about what you want to draw carefully.