If it gives our friend pleasure, fine, it seems to be a sweetie to an infant!
Aw I'm not an infant. I like to know precise meanings & notice when people are imprecise, don't mind when my mistakes are pointed out to me. If I heard something incorrect I probably wouldn't say anything in real life because there's a time and place but would think it. Here isn't real life tho' & we learn all the time. That's the reason places like this exist.
From Cambridge dictionary:-
tantrum
noun [ C ]
UK /ˈtæn.trəm/ US /ˈtæn.trəm/
a sudden period of uncontrolled anger like a young child's:
"Charlie had/threw a tantrum in the shop because I wouldn't buy him any sweets."
If she doesn't get her own way she has (temper) tantrums.