Ada and friends brainstorm ways to unlock the door to her brother's backyard fort.

Ada, Rosie and Iggy work together to revive the Pecks' wilted garden.

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.

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.

It's science to the rescue when Arthur's pet lizard goes missing.

The kids work together to get Mooshu — and Arthur's toy helicopter — down off the roof.

Ink disappears right before Ada's eyes, but was it magic... or science?

The friends help Arthur figure out why he can’t score a goal in soccer.

Ada and company construct a parachute, using eggs as crash-test dummies.

The kids learn to pivot when their plans to build a snow fort don't pan out.

When Arthur claims the Twist Family Egg Hunt is too easy for him, Ada vows to make it egg-stra challenging.

Iggy’s on a mission to make his kite fly.

Iggy designed an awesome skate park but has more fun watching his friends enjoy it.

The kids build a high-tech nurse bot to help Mom Twist fight the flu.

Rosie's convinced she needs bigger muscles to karate chop her way through a wooden board.

The kids make a metal detector to find a missing time capsule.

Rosie wants to win the Raucous Riveters Reunion Race — but something's wrong with her car!