This lyric comes from "Little Monkey Who Loves Dancing", which is generally used in kindergarten teaching to let children master the rhythm and cooperate with music performances.

Lyrics of Little Monkey Who Loves Dancing: Little monkeys love dancing and jump up and down. The first line nods, the second line shrugs, the third line twists the waist, the fourth line slaps the leg, and the fifth line hops on one foot. Little monkeys love to dance.