Marvel Action Classic: Ant-Man #1

Henry Pym is a hapless inventor whose creations have never interested investors. However, his new pest control helmet which allows him to communicate with insects becomes vital in saving the world when a colony of ants warn him of Psycho-Man's plot to manipulate the emotions of Earth people using Emoticon Projectors. In the course of stopping Psycho-Man, Pym learns to change his size and becomes the Ant-Man: hero of the ants!