In a 1952 episode of I LOVE LUCY, Lucy takes a well-paying babysitting job. 

She jokes that she might be minding a baby gorilla but the job is actually to babysit unruly twins instead.

In a 1967 episode of THE LUCY SHOW, Lucy takes a well-paying babysitting job.  She expects to be minding children but the job is actually to babysit unruly chimps instead.