Dmitry Grishin knows a lot about the virtual world, serving as CEO of Mail.ru
, a Russian social networking and games website worth more than $6 billion. But when the 34-year-old decided to start his own company on the side, he opted instead for something far more physical -- robots -- stemming from his own childhood passion for playing with construction sets.
Last year, Grishin set aside $25 million to found Grishin Robotics, which invests in companies creating consumer robots.
