When Ellie, who loves to invent and build things, decides to build a doghouse as a gift, she needs to get past the boys-against-the-girls neighborhood feud and ask for help.
When Ellie and her friends help elderly Mrs. Curran around the house, Ellie cannot resist using her engineering prowess but it is no fun for the girls when Toby gets the credit.
When Kit's pageant rival Melody loses her rabbit, Ellie believes she can build a contraption to catch him, but she begins to doubt herself when Melody insists that a pageant is no place for messy engineering experiments.
