Nine-year-old Kelsey Ryan is severely allergic to peanuts. If she were to eat one -- or even something with peanut oil on it -- "I would probably die," she says.

So everywhere she goes she carries an EpiPen, a needle that allows her to give herself a quick injection of epinephrine to reverse the swelling of an allergic reaction that would close her airway.

At her school, all her teachers know about it, and the device is with her in the classroom. But in some Florida school districts, children can't have them on their person -- they're usually kept in the office. A new law that Kelsey pushed for changes that so kids who need them can carry them.