Don’t You Worry Child for 5 Cellos, a pop song cover by String Theory, Columbia University’s premiere cello ensemble. There are more cellos playing in the archives. This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content. Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.