What are examples of metaphor in where the side walk ends by dr Seuss?

In "Where the Sidewalk Ends" by Dr. Seuss, examples of metaphor include lines such as "And he said to me, 'Explain to me, why it is you run'" where running may symbolize escape or seeking answers, and "There's a place where the sidewalk ends" where the sidewalk represents the limits of one's known world. The overall tone and whimsical imagery in the poem create a metaphorical journey of curiOSity and exploration.