She wanted to send her Hello Kitty doll on the trip, so she build her a little rocket to travel in, and attached it to the scientific equipment.
She launched the rocket from Antioch, California, where it was buffeted by strong winds as it rose to its highest point, over 93,000 feet up! When the balloon burst, it sent Hello Kitty back down, to land nearly 50 miles away. Lauren recovered the equipment, with the help of several adults, as it was tangled in a tree 50 feet off the ground, and completed her assignment. And, then, for good measure, made this awesome video.
Best. Science. Fair. Entry. Ever.
(source: NY Daily News)