A Spanish Fork girl is improving, but her sister remains in critical condition following a freak accident Wednesday.

Alyssa Garfield, 6, and her sister Andrea, 10, were inside a Moonwalk - an inflated room where children can romp. The attraction, like similar ones at fairs and carnivals, was being used to promote Skipper's Seafood 'n Chowder House in Provo. At 6 p.m. Wednesday, strong winds picked up the Moonwalk and flung it over the roof of the restaurant, a Provo Police dispatcher said.Alyssa is in critical condition at Primary Children's Medical Center. She suffered serious head trauma, internal injuries and damage to her legs.

Andrea suffered abdominal and back injuries. Her condition has progressed from critical to fair.