her name is mpenzi.s the large lady lending a helping trunk. mpenzi didn't grow up in the wild. she was an orphan and was raised here, at an orphanage for elephants in kenya. these kids have all lost a parent to poachers, mainly. and here they're cared for by the gentlest men you've ever met. not only do they spend all day with their elephants; when it's sleep time, they bed down right next to them. welcome to 60 minutes on cnbc. i'm bob simon. in this edition, we visit with a trio seeking to make a difference by offering a helping hand to those in need. we begin with nicholas negroponte, a professor at mit. he's the founder of a nonprofit organization called one laptop per child. his vision is for every child to have a laptop computer, and with it, the possibility of a better future. he recruited a cadre of engineers and programmers who created the low-cost xo laptop. it costs less than $200 and is designed to be used in some of the most impoverished places on the planet. as lesley stahl reported in may