JLA: World Without Grown-Ups #1 (1998)

Book One
When every everyone over the age of sixteen suddenly disappears from the face of the Earth, the world is thrown into an upheaval of adolescent amusement and chaos. But when the initial euphoria wears off and the dark reality of the situation sets in, Superboy, Robin, and Impulse must figure out what happened to half the population while simultaneously attempting to maintain order in a world of unrestrained children. Featuring Batman, Superman, Wonder Woman, and Green Lantern, this book is an amusing portrayal of the grave consequences of an existence devoid of grown-ups.
Release Date: 1998