PBS, it seems, has always had a fascination with science. After all, Nova is one of their longest running primetime shows. For 15 years (1983-98), Newton's Apple was the daytime equivalent.
Often shown as an after-school entry, Newton's Apple helped fulfill one of the remaining scholastic curriculums that hadn't been addressed on PBS. Sesame Street has been an entry-level program for preschoolers learning numbers and the alphabet. The Electric Company, in its original incarnation, was elementary school level English class with theatrics.
I never saw the show, so there won't be a rating. One wishes, though, that PBS would bring it back on the air, with reruns airing on their PBS Kids channel. Here's the intro: