So along with site graduation, one new option we have is an info box on the sidebar. For example, you can see what these look like on Law or Judaism Stack Exchange (directly above the "featured on meta" box). These are used to link to important meta posts that new users need to be aware of.
Liiiiike The Sandbox! We encourage almost all new users to use the sandbox before posting challenges to main, so it would be really great if we could put a message up visible to all new users directing them there. This will also mean that we don't have to keep featuring the sandbox every month when it automatically unfeatures (which is kind of annoying to do).
Now the only problem. What should the text say? If you have an idea for what the text should say, post it as an answer. Ideally, we're looking for something
Short. Ideally 2-3 sentences (This is code-golf after all!)
Communicates the purpose of the sandbox.
Communicates the purpose of this site.