Convinced they'd be better off raising themselves, the Willoughby children hatch a sneaky plan to send their selfish parents on vacation. The siblings then embark on their own high-flying adventure to find the true meaning of family.

In this offshoot of the 1950s "claymation" cartoon series, the crazy Blockheads threaten to ruin Gumby's benefit concert by replacing the entire city of Clokeytown with robots.