Every entrepreneur wonders: “Will my startup sink or swim?” When Felix Brandon and his wife Jordan Lloyd Bookey launched Zoobean , a startup focused on children’s reading, they found themselves swimming in rough waters early on. A few months after launch, the founders were invited to pitch their business on the TV show Shark Tank. What felt like a sinking moment turned into more than a lifeline for the fledgling business — it entirely transformed their business model. In the year that followed the Shark Tank episode, Zoobean went from a consumer subscription service to an enterprise reading program platform loved by millions of readers of all ages. As Zoobean pivoted, Heroku’s scalable application hosting solutions helped its founders grow their business without worrying about software scalability. From the mouths of babes to the scrutiny of sharks Zoobean began in the simplest way: with a child’s comment.…