Don't Crack the Eggs!

This delightful story is in B.A. Landtroop's Easy Read Book series!
Ages 6-11
Kathy is expecting a mystery book in the mail today. What she finds in the mailbox instead isn't a book. Instead she finds something that thrills her. Then worries her. Time is short and Kathy has to find a solution right away! Will you think of the same solution as Kathy?