Descriptionari Junior (www.descriptionarijunior.com) and Descriptionari (www.descriptionari.com).
These new websites are a new kind of online thesaurus that help young writers with descriptions and inspiration for writing. Descriptionari Junior also comes with free language arts resources.
Descriptionari is community built. Content suitable for minors is published on Descriptionari Junior. Contributors to Descriptionari can use their Descriptionari profile page to freely self-promote any online work they have such as blogs and fan fiction and social media accounts such as Twitter, Facebook and Googleplus.
Descriptionari and Descriptionari Junior are quite new, so you might find what you are searching for isn't there yet, but they are definitely worth checking out!
Hope you like them,