This is the 386th most frequent Ukrainian word.
ними
"Ними" means "by them" or "with them" in English.
The word 'ними' is an instrumental pronoun referring to the third-person plural and is used here to indicate 'with them'.
Ми зустрілися з ними в кафе.
We met with them in the cafe.
'Ними' is used here in the instrumental case to indicate the object of the pride.
Їхні батьки гордяться ними.
Their parents are proud of them.
In this sentence, 'ними' refers to 'the new toys' and is used to indicate the object being shared in the instrumental case.