Baby Checkers

Gran'pa Monkey and his two grandsons open a babysitting service, where they look after a variety of jungle fauna offspring- including a mischievous baby elephant who drinks up all the milk and accidentally gets glued to a bearskin rug. To keep track of all the wayward cubs, the simian siblings assign a number to each animal child... but later on, the infants switch numbers with one another; so, Gran'pa Monkey ends up returning the wrong child to each parent. Needless to say, the dissatisfied customers take out their vengeance on the three monkeys- at the end of the cartoon- by giving the trio a thorough "scrubbing" in a bassinette!

Gran' Pop Monkey, The Three Monkeys

Of the many bizarre visual gags in this cartoon, one of them involves a monkey teaching 'deep-breathing exercises' to a baby weasel... who promptly inflates like a balloon!

Excerpts from this European cartoon were (briefly) shown on an episode of "The Beverly Hillbillies" on CBS. (The scene involves Mr. Drysdale [the bank manager] watching said cartoon on a TV in his desk drawer, before he's interrupted by his assistant Miss Hathaway.)