40 Under 40: When they were kids

Now, they're the best and the brightest young minds in business. Back then, they were precocious toddlers and smiling babies. Can you guess who's who?

Hint: As a frustrated and underfunded public school teacher in 2000, the charity superstar launched an outfit that has sponsored more than 200,000 classroom projects and raised nearly $100 million. He originally thought he'd be a cop (the New York police academy held a spot for him for years), but now he has a new goal -- making school budgets smarter by opening up his charity's wealth of data. Stephen Colbert (a board member) recently sang a rendition of Rebecca Black's "Friday" as part of a stunt to raise money for the cause.

By Anne VanderMey, reporter - Last updated October 24 2011: 2:34 PM ET
Join the Conversation
The list

They're the hottest young stars in business across the globe. They're innovators, disrupters, and job creators; in fact, it's a pretty safe bet you're going to be working for them someday -- if you aren't already!

Video
Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer LIBOR Warning: Neither BBA Enterprises Limited, nor the BBA LIBOR Contributor Banks, nor Reuters, can be held liable for any irregularity or inaccuracy of BBA LIBOR. Disclaimer. Morningstar: © 2014 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2014 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2014. All rights reserved. Most stock quote data provided by BATS.