It's Shirley Temple, but why she's posing with an empty gravity racer, I don't yet know

http://www.singlefingerspeedshop.com/pivot/entry.php?id=170

This is about the time, age 17, that she co-starred with Cary Grant in the movie, one of my favorites, Batchelor and the Bobby Soxer https://justacarguy.blogspot.com/2015/06/hot-rod-and-jalopy-in-movie-bachelor.html