"I grew up online and have been involved with social media for a long time," says Mr. Eich, who spent part of his childhood in Africa, often playing with simple wooden toys. "When I began, I had practically zero money and no tools to do a big business plan, but I knew I wanted to do this toy company. So I created a framework online and asked for people's ideas and feedback. It was all about interacting with people and trying to set up meaningful relationships. The business evolved out of that."