Action Boy is Captain Action's sidekick, the original Super Hero Action figure, created by Ideal toys in the 1960s.
In 1967 Ideal Toys mirrored the tradition of teen age sidekicks by introducing a teen-age companion for Captain Action: Action Boy! As Robin is the happy antithesis of the dark Batman, Action Boy's smiling, ebullient face offers a marked counterpoint to the stoic, almost sad visage of Captain Action. The original costume was red and blue with a later edition was a metallic silver and blue similar to a space suit. Both editions came with a leashed black panther (named Khem in the Captain Action comic series).
As with Captain Action, Ideal created costumes for Action Boy including Robin, Superboy and Aqualad. The packaging art on these costume boxes was drawn by famous silver age DC artist Murphy Anderson.
What's it worth? Take a look at this Action Boy price guide: sold listings for a value indication.