Ada and friends brainstorm ways to unlock the door to her brother's backyard fort. The kids use the scientific method to prove Mooshu Kitty's innocence.
A power outage zaps Ada's plans for the "perfect" movie night. Rosie's Great Aunt Rose is coming, and she loves banana bread so its time to get peeling.
The power of observation helps Rosie and the gang tune an old piano for a living room recital. Rain forces the kids to rethink their outdoor party plans.
Ada and friends follow their noses and discover the source of a bad smell: Arthur's tennis shoes. Taking a 'brain break' helps the kids solve a problem.
