I built this when I started learning Chinese because I wanted a more efficient way to study radicals. Having found it useful, I figured I might as well share it.
If you're new to the language, radicals are recurring parts of Chinese characters, and learning the most common ones makes new characters much easier to recognize and remember. Many began as simple pictures: 山 is a mountain, 木 is a tree. Once you see it, you can't unsee it.