The Physics of the Balloon Boy

Was it even possible for six-year-old Falcon Heene to have flown inside his balloon?

I guess some people will do anything to get on television. In the media blitz last week, nobody seemed to pause to wonder whether the escaped helium-filled contraption would in fact have sufficient buoyancy to carry a 40-pound boy to a height of 7000 feet. Let's apply some physics to the case.