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.

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!

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 and wants to find a way to get back home

Rosie built a special Valentine's Day catapult called "The Love Launcher," but it isn't working the way she'd hoped. Time to get organized and fix it!

Ada and the gang take Arthur on an out-of-this-world adventure to convince him that caring about Earth is cool — and really important!

It's science to the rescue when Ada has a hair emergency on the day of Grandma and Pop-Pop's golden anniversary. Can she get her signature curls back?

While playing Goblins & Dragons with Arthur, Benny accidentally breaks a rare figurine, sending the kids on a science-fueled side quest to replace it.

When the town's annual water battle is canceled due to drought, the Green Team works together to find a more sustainable way to have fun.

Benny's planning a special gift for his dad's birthday that involves a mixtape, magnets — and bringing his mom's amazing music back to life.

To win the Silver Saddle trophy, Rosie must balance on a bucking bull for 8 whole seconds — just like her mom and Great Aunt Rose. Can physics help?

The grown-ups are making a racket while practicing for the Last Band Standing competition. Can the kids solve the problem with science?

The friends hunt for treasure inside a dark cave, where their pal Pepper teaches them about echolocation — and shows them there's another way to "see."

When a tornado touches down on the day of Sensei Dave and Jiu Jitsu Joe's wedding, the gang must think up a way for all of the guests to safely gather.

Ada goes looking for a wormhole so she can travel back in time and fix an embarrassing mistake. But what if she never finds one?

The Green Team stands up for a beloved oak tree when Principal Rahul announces plans to chop it down to make room for a brand-new swing set.

Ada and the team serve up smart ideas to help Arthur tackle a tough tennis opponent. But the biggest win of all? Convincing him to keep an open mind!

While investigating a "monster" at the creek, the kids discover something even scarier: tons of yucky trash! Can they build a machine to clean it all up?

NASA thinks there might be a ninth planet on the edge of our solar system, and Ada and her friends are determined to help them find it!

Iggy promised Bee-Bee he'd build her a tea party palace for a playdate with new friends. But there's a problem: He can't remember where his plans are!

The Science Scouts pitch in to help Mom Twist make pizzas for the Community Kitchen. But when the power goes out, how will they feed folks in need?

A high-tech AI bot built to help Ada craft the perfect story for a kids writing contest can't compete with human creativity... or can it?

Meet real-life scientists who know their stuff, from a contraptionist who builds sturdy bridges to a zoo archaeologist who studies animals from the past.

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