What metaphors are used in A Girl Named Zippy: Growing Up Small in Mooreland, Indiana by Haven Kimmel?

Rodeo Bike is Zippy's first bike: a metaphor for childhood innocence. It is lavender with a purple sparkly banana seat with brightly colored streamers dangling from the handlebars. She rides it often, including when she tries out her new wig. When she outgrows it, she creates a shrine for it and plants zinnia seeds.