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.