It used to be the first million. Now, you only turn heads when you hit a billion.

Warren Buffett, the iconic chairman and CEO of Berkshire Hathaway, is worth $53.5 billion. He wasn’t always. But Buffett started early. When the “Sage of Omaha” was in high school, he spent $25 on a pinball machine that he put in a barbershop. With an eye for a good investment, Buffett ended up selling the pinball machine for $1,200, according to this infographic compiled by eBay Deals. He bought his first stock at age 11 and started at the Wharton School of Business at University of Pennsylvania at age 17.

Related: The Answer To Life From 18 of the Wealthiest People in History [Interactive Graphic]

Meanwhile, Elon Musk, the inventor behind Tesla Motors, was born in South Africa and taught himself to program computers as a kid. He had programmed and sold a video game by the time he was 12.

Take a flip through the interactive infographic below to see the early career highlights of other now multi-billionaires getting to their first billion.

Just click on the image given below to open up the infographic: 

how-buffett-musk-other-multi-billionaires-hit-it-big

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