Fantastic Max was an early morning animated series about a baby and his wild imagination. One-year-old Max Fifelton [Ben Ryan Ganger] has two imaginary friends who turn to life once the parents are away: FX [Nancy Cartwright], a childlike green alien toy from the planet Twinkle Twinkle, and A.B. [Gregg Berger], a mature doll made of building blocks. With FX's exclamation of "rock and roll!" after getting his back string pulled, his antennae twist and sparks fly, turning Max's bottle into a spaceship in which they travel to outer space, which was the setting for most of the episodes.