Wash on!

"One day when Mrs. Gillis is giving her daughter a bath, Petronilla cries, 'Wash on!' 'Wash off, dear,' Mrs. Gillis corrects her. But Petronilla's words seem to have power. The blue of the washcloth has stained the girl's cheek. And that is only the beginning. Colors start transferring between every object Petronilla touches. And every person. And every person who touches an object that has been touched. Before long, the entire world is a spreading mess of colors, and only Petronilla can stop it. But will she?"--Provided by publisher.