A doc following puppeteer Kevin Clash's journey from shy Baltimore teen to Jim Henson protégé and, eventually, sole performer of Sesame Street's most popular resident. The story here is the American dream: Want something hard enough, and you can get it. But it's also a reminder that all passion comes with a cost, and for the man who plays Elmo, it is spending much of his daughter's childhood entertaining other people's children. Though the film tends to skim over the nitty-gritty details, it's these little glimpses of life behind the Henson gloss that make the doc worth a look.