How lovable is LeVar Burton? After raising $5.4 million on Kickstarter to make Reading Rainbow more accessible to children and shedding tears over its success, LeVar Burton went on Jimmy Kimmel for a sketch titled “Tweeting Rainbow.†He takes a quartet of kids through the wide Twitterverse, reading aloud tweets from Mario Lopez and Snoop Dogg, explaining a retweet, and saying he’s going to get into a Twitter feud with @kanyewest. It’s adorable, and surprisingly helpful.