This concerns my youngest great grandson.. and I am sure many here can relate similar incidents with their progeny.
My great grandson Kylo, is at least to me..a remarkable little boy at 20 months..just as many grandparents think of theirs..

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For his age, he has an extensive vocabulary..and he is adding to it every day at warp speed. His Mom..my grandaughter, is teaching him well.
She is teaching him to be bi-lingual, a relatively easy task, since her husband is Hispanic. Adding to that she is teaching him sign language..,
and he knows his A-B-Cs quite well already.
He takes to these lessons in an eager manner...but when he encounters a new word..he has to practice it right off.
Last Friday his new word was "Help" !
So that afternoon, my grandaughter took him along with her to Walmart, where while seated in the cart ..up and down the aisles, Kylo is shouting
over and over.... "help...help..help".
She could barely keep him silent..all the while fearing security may be calling upon her to prove the boy is her own !

...But they finished their shopping foray without an incident.