The poem "I Wonder" describes a curious child who wonders about natural phenomena like why grass is green, who teaches birds to build nests, where the missing piece of the moon goes, who lights the stars and makes rainbows. It has 6 stanzas with a rhyming structure and is told from the first person perspective of the wondering child. The child is curious about nature and wants to know the explanations for these natural occurrences but their father does not provide answers.