The annoying Kravitz nephew should look familiar. RIck Powell played the boy in "Just a Kid Again" (February 26, 1970.) He was the boy version of the store sales Man Tabitha changed into the boy.
In Don Adams and Lesley Ann Warren (1967), Carol did a skit with Don Adams, in which she cries and talks very high-pitched, incomprehensible (on purpose) words, including uttering: "ti-ti-ti-ti". It is unclear if Imogene Coca based her performance on that, but it is a strange coincidence. Indeed, Imogene had appeared the previous month in Imogene Coca and Lainie Kazan (1967) and would appear, again, several times. Also, Liz Montgomery was once in the show's audience and---when Carol introduced her---she mentioned that they had made a movie together. So, it is highly likely that Imogene watched that week, saw the high-pitched "ti-ti" and decided to use that for her good fairy performance. Too similar to be dismissed as a mere coincidence. Many artists borrow from others whom they'd admired, and it seems to have indeed been the case here.