What are the poetic devices in Henry S. Leigh's poem the twins?

Henry S. Leigh's poem "The Twins" uses poetic devices such as rhyme, alliteration, and personification. The rhyme scheme is AABBCC, with a sing-song rhythm that adds to the whimsical tone of the poem. Alliteration is used throughout, such as in the line "Twins that are one by parent plan." Personification is evident in the portrayal of the twins as mirror images of each other, almost like two halves of the same whole.