Yikes! Grandma's a Teenager (Zack Files Series #17)

A trip to New York City to celebrate her 89th birthday—and participate in a Rockettes reunion at Radio City Music Hall—leaves Zack's Grandma Leah feeling younger than springtime. And she's looking that way too, since a strange trip through an airport metal detector turned back the hands of time and is making Grandma grow younger and younger!