Tumblr

Tumblr is a microblogging platform and social media network.

Sesame Street

 * sesamestreet.tumblr.com
 * The official Sesame Street Tumblr dates back to at least August 10, 2010.
 * vintagesesame.tumblr.com
 * Sesame Workshop's official vintage-theme Tumblr dates back to April 30, 2012.