Zelda and Ivy by Laura McGee Kvasnosky

A three-chapter storybook sharing the adventures of two fox sisters, Zelda and Ivy. Zelda, the elder sister, gets her younger sister, Ivy, in all kinds of trouble (falling off the swing when they're playing circus/flying trapeze, painting and cutting her tail), but ends up giving Ivy her baton one night when Ivy puts "fairy dust" under her pillow wishing for a baton like her older sister's. Ivy, as the younger sister, always goes along with Zelda's plans, but always gets the short end of the stick even after Zelda "gives" Ivy her baton.