"Harry feels ignored when his family pays attention to the neighbor's visiting guinea pig, but everything changes when the children bring both Harry and the guinea pig to school"--OCLC.
After Cassie leaves her backpack at the arcade, Ant-Man helps his daughter by shrinking them both and sneaking into the place, but when they decide to go into a pinball machine and Cassie gets stuck, the hero must rely on his ants for help.