Supply is like having a big box of toys. When you have a lot of toys in your box, you have a big supply of toys. If you want to share them with your friends, you have enough to give everyone a toy to play with. But if your toy box is almost empty, your supply is low, and you may not have enough toys for everyone to play.
Think of supply as a magic fountain that makes candy. If the fountain is working well, there’s plenty of candy for everyone to enjoy. But if the fountain is slow or stops, there’s less candy for everyone.
Imagine a cookie jar. If the jar is full, there are lots of cookies to eat, and you can have some whenever you want. But if the jar is empty, there are no cookies to eat, and you’ll have to wait until someone makes more. Supply is like how full your cookie jar or toy box is, and it helps decide how much you can share or use.