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.

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 chall...

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!

The gang reinvents a toy for Ada's cousin, who has autism.

Ada and Rosie make a public speaking potion to help boost Iggy's confidence.

To get glitter off the rug, the team turns a negative into a positive.

Ada builds a DadBot to make Mom's life easier around the house.

The friends learn all about thunderstorms to help Rosie feel less afraid of them.

Iggy designs a bridge to help a stranded Arthur cross the creek for Free Ice Cream Day.

Tents are on the agenda when the Twists take everyone camping.

Ada tries to get her parents' old roller skates back into shape.

The kids use their heads — and noses — to keep Ada's pet spider out of the house.

A creeped-out Iggy's convinced there's a ghost in his basement.

The team tests different materials to keep Lil' Liz and her terrarium warm.

Laughter's the best medicine... but is it contagious?

Ada hopes muscle memory can help her ace her dance moves for an upcoming recital.

The Science Scouts build a hotel to bring bees back to the park.

Ada's so worried about making the perfect prototype that she can't stop sleep-working.

When a new family moves to town, the team meets Benny, a sci-fi loving kid who misses his old life a...

Rosie built a special Valentine's Day catapult called "The Love Launcher," but it isn't working the...

Ada and the gang take Arthur on an out-of-this-world adventure to convince him that caring about Ear...

It's science to the rescue when Ada has a hair emergency on the day of Grandma and Pop-Pop's golden...

While playing Goblins & Dragons with Arthur, Benny accidentally breaks a rare figurine, sending the...

When the town's annual water battle is canceled due to drought, the Green Team works together to fin...

Benny's planning a special gift for his dad's birthday that involves a mixtape, magnets — and bringi...

To win the Silver Saddle trophy, Rosie must balance on a bucking bull for 8 whole seconds — just lik...

The grown-ups are making a racket while practicing for the Last Band Standing competition. Can the k...

The friends hunt for treasure inside a dark cave, where their pal Pepper teaches them about echoloca...

When a tornado touches down on the day of Sensei Dave and Jiu Jitsu Joe's wedding, the gang must thi...

Ada goes looking for a wormhole so she can travel back in time and fix an embarrassing mistake. But...

The Green Team stands up for a beloved oak tree when Principal Rahul announces plans to chop it down...

Ada and the team serve up smart ideas to help Arthur tackle a tough tennis opponent. But the biggest...

While investigating a "monster" at the creek, the kids discover something even scarier: tons of yuck...

NASA thinks there might be a ninth planet on the edge of our solar system, and Ada and her friends a...

Iggy promised Bee-Bee he'd build her a tea party palace for a playdate with new friends. But there's...

The Science Scouts pitch in to help Mom Twist make pizzas for the Community Kitchen. But when the po...

A high-tech AI bot built to help Ada craft the perfect story for a kids writing contest can't compet...

Meet real-life scientists who know their stuff, from a contraptionist who builds sturdy bridges to a...

From a skate park designer to a pastry chef, these real-life heroes with super-cool jobs put science...