In Caroll Spinney's Sesame Street retirement announcement Wednesday morning, Big Bird got many of the headlines. But in addition to playing Big Bird, Spinning also voiced the famously grumpy, trash can-dwelling Oscar the Grouch. "He hates talking to people, complains all the time and treasures an old fish wrapped in newspaper and his pet, Slimey the Worm," Karen Zraick writes of Oscar. "But Oscar’s curmudgeonly nature and his dirty, matted green fur make him all the more endearing to his admirers. And with his constant kvetching, he offers kids lessons about how to handle conflict or negative emotions, like annoyance or anger." ALSO: Watch Sesame Street's tribute to Caroll Spinney.