You must be remembering "(More Books From) Cover to Cover with John Robbins", which was on public TV in various forms from 1965 to 1994.
One variant of this series, "Gather 'Round", featured illustrator Rae Owings (who did the bulk of the "Cover to Cover" artwork), doing the illustrations on-camera while host Paul Lally narrated the story.
get black sweat pants/shirt
get those puffy bones that you stick on the wall to decorate, and stick them to the sweatsuit.
a skeleton mask, and gloves and shoecovers that have the skeleton theme.
get some of that pull n peel licorice, or licorice rope (in red) - that could be the muscles, just paste it onto the sweatsuit with fabric glue vertically, following the pattern of normal muscles.
and use fabric paint in blue (for veins) and white (for tendons) to paint over some of the licorice
as for organs, search online for plastic or rubber organs - either gags or learning tools.
Who Watched These Classic PBS Kids Shows From The 70's and 80's?
Ok was John Robbins the guy who would draw pics while reading? if I remember correctly this show made me crazy he never actually finished the books and they were always random books from God knows where never had them at my local library even now no matter how dull a book is I have to finish it probably because of him! Slim Goodbody was creepy sorry the outfit was just wrong. Loved Degrassi tho
That version you saw was "Well, Well, Well! with Slim Goodbody" (which was released in 1985). The bum/street person-type character was called Hairy T. Sludge, who would give the audience contrary advice to what the episode's topic was. The segments always ended with Slim vowing to get him someday and set him straight.