This children's song uses personification as a rhetorical device.

Silkworm baby nursery rhymes use anthropomorphic rhetorical techniques to compare silkworm babies to humans, giving them human movements and emotions, making the image of silkworm babies more lively, cute and full of childlike interest. For example, children's songs describe silkworms as "eating mulberry leaves and rustling", "growing taller and taller", "spinning silver threads and building new houses", etc. These all personify the behavior and characteristics of silkworms, making the children's songs more imaginative. and fun.