Miniclip has a search box showing in Google SERP: how?

[vivekg]

For their brand keyword search - miniclip - Google SERP includes a search box reading "Search miniclip.com". Any one has an idea how this can be done?

[KeriMorgret]

This has been a feature for several years, though I believe it's one that Google chooses whether to enable for you. There's a post about when it first came out at http://googleblog.blogspot.com/2008/03/search-within-site-tale-of.html.

[vivekg]

Thank you