sandbox

A simulator or parcel for building/experimenting in SL. "Sandbox" is also used to refer to the 10 meters of movement distance objects are allowed when STATUS_SANDBOX is enabled. In the context of memory, scripts are executed in a protected environment often called a "sandbox". This protected environment ensures that scripts can not affect each other's or the simulator's stored data.

If you're looking for a place to experiment with wiki markup see WikiSandbox.