A Wiki is like a special online book where people can write things together. Wikispecies is a special kind of wiki that helps us learn about different kinds of living things, such as animals, plants and bacteria.
Let's say you're curious about tigers, but you don't know much about them. You can go to Wikispecies and look up tigers. There you'll find information about what tigers look like, what they eat, where they live, and other interesting things.
But what's really cool about Wikispecies is that anyone can add information to it! So if you know something interesting about tigers, or you find a new species of plant that nobody has ever heard of before, you can add that information to Wikispecies so that other people can learn from it too.
And because Wikispecies is a community effort, it's always growing and improving. That means that the more people use it and contribute to it, the better it becomes as a tool for learning about the wonderful world of nature around us.