These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Older Than They Think: Prior to the creation of this show, Bob Clampett held a puppet show called Time For Beany, which shows Cecil's roots as a hand-puppet. (which became a Running Gag in the show, as we never see the bottom of Cecil) Oh, and Stan Freberg voiced Cecil. The cartoon was first billed as Matty's Funnies with Beany & Cecil (sponsored by Mattel toys). It aired in prime time for just the 1961-62 season, then migrated to ABC Saturday morning for five years as just "Beany & Cecil."