I have only a vague recolection of this show, as the only time I saw it was a week home sick with the Chicken Pox (I’m willing to accept that it might have been a fever-dream as well).
It was a serial adventure featuring creepy puppet kids on a sailboat. And not cute puppet kids either, scary articulated ventriloquist dummy-type puppets with those mouths that unhinge when they talk, like a snake preparing to swallow an egg. I was under the impression it was called “The Voyage of the Mimi”, but this rules that out.
The creepy puppets were just one part of a show called “**Vegetable Soup**” that ran in the late 70’s. Check out that little picture of the afformentioned puppets and wonder why I thought it was the fever talking.