No Parents Day — Annie Auerbach

One morning Jimmy Neutron and his friends wake up to find all the grown-ups of Retroville gone. And with no one to stop them, the kids go on a fun-filled free-for-all! But things turn sour when there's no one to soothe their stomachaches or tuck them in at night. And when Jimmy discovers that aliens have kidnapped their parents, the kids set out to get them back -- and fast!