If you didn’t already know, billionaire and class traitor Warren Buffett has his own online financial literacy cartoon — the Secret Millionaires Club — which is sponsoring a competition for budding 7- to 16-year-old business tycoons. A group of the finalists will actually have the opportunity to pitch their business ideas to the Sage of Omaha next month. Start-up capital is just $5,000 for the grand winner, which is at least enough for one lucky kid to corner this summer’s lemonade-stand business.