>A decade ago, Mr. Neumann was a small-time entrepreneur in his 20s living with his sister, a model, in her Tribeca apartment. Mr. Neumann, who was raised on a

>A decade ago, Mr. Neumann was a small-time entrepreneur in his 20s living with his sister, a model, in her Tribeca apartment. Mr. Neumann, who was raised on a kibbutz in Israel, was struggling with his first startup idea—women’s shoes with collapsible heels—which failed to take off. His next venture was baby clothes with knee pads called Krawlers. Who didn't see this coming?