Okay kiddo, so imagine you have lots of toys, and you want to keep track of them all. TortoiseCVS is a kind of computer program that helps people keep track of changes they make to their computer files, like a special toy box for their files.
When people work on a project together, they might all have copies of the same files on their own computers. TortoiseCVS tracks all the changes that different people make to the files. That way, everyone knows what's going on and can stay updated.
Let's say you and your friend are working on a picture together on different computers. One day, you draw a dinosaur in the picture, and your friend doesn't know about it yet. TortoiseCVS helps your friend know that you added the dinosaur, so they can see the new and improved picture.
TortoiseCVS is helpful for lots of different kinds of projects, like making videos, writing stories, or making websites. With TortoiseCVS, it's easier to work with other people and keep track of the changes everyone makes.