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 — time to get peeling!

The friends whip up a tasty solution when Mom Twist forgets her anniversary. & Ada, Rosie and Iggy work together to revive the Pecks' wilted garden.

The kids examine what a bird's nest is made of so they can build a new one. & Ada and pals invent a gizmo to help an exhausted Arthur get more sleep.

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.