This is the 3357th most frequent Russian word.
поет
"Sings."
Here, 'поет' describes the action of singing performed by the subject 'Она' (she).
Она красиво поет каждый вечер.
She sings beautifully every evening.
In this sentence, 'поет' is used metaphorically to describe the sound resembling singing produced by the pipe.
Труба на чердаке иногда странно поет.
The pipe in the attic sometimes whistles strangely.
Here, 'поет' emphasizes the act of singing being actively done by the subject 'малыш' (toddler).