Dr Xand gives blood and follows it through the factory and out to a patient in need.
Pencil, paper and clear instructions help build the ideal treasure map.
Bob is stuck in a runaway hot air balloon and needs clear instructions to land it.
British boyband Union J pop by with a harmony challenge for the kids.
Join Lennox as he goes on his first picnic.
Teddy gets a lift today as our friends make superstrong lifters!
Princess Purl is going to sleep for a gazillion years unless Bitz can wake her up.
Adventurer Andy Torbet takes on the planet's most heat-resistant animal, the Pompeii worm.
Dr Chris and Dr Xand investigate snot and spit and the important roles they play.
Join Daniella as she learns to swim.
A look at coughing and sneezing - the body's ways of getting rid of unwanted stuff.
We're using rubber bands to test how the energy stored can launch paper balls!
Bitz and Bob have to rescue Purl from the clutches of Pirate Bevelbeard and his shipmates.
This film revisits three refugee children who featured in the Boy on the Bicycle.
Join Grace as she starts her first hobby.
It's Sport Relief with Radzi and a guest presenter Brad from The Vamps!
Gav wins Bristol's Best Dressed competition and Ricky becomes a viral fashion sensation.
Ed and his mates explore nomadic areas of Mongolia's capital, Ulaanbaatar.
We're exploring friction by racing toys on different surfaces!
A climb up Mount Robo-Bob is interrupted by the appearance of abominable snow monsters.
Join Ava as she goes to the dentist for the first time.
JB and Storm find out about farm robots, farm cats, donkeys and glass recycling.
Today we're designing plastic-bottle cars to put to the test on our obstacle course.
A race across the desert slows to a crawl when Bitz and Purl over-engineer their vehicle.
Join Fern at her first birthday party, which includes face painting and a bouncy castle.
How check lists can help get paper planes flying and balloon-car races on track.
Bob's go-kart becomes a no-go-kart when it starts falling apart during a race.
The singers must create their own popstar image. The mums brush up on their art skills.
Join Annie as she learns to ride a horse named Thunder.
Join us as we make conveyor belts - perfect for getting toys from one point to another!
Bitz is desperate for famous chef Madame Gourmet to taste her yummy Bitz mix marmalade.
Andy Torbet goes Beyond Bionic as he attempts to match the swimming skills of the seal.
Join Masie as she gets her first bike and learns to ride it.
Zimbabwean teenager Tanya trains for an international motocross race in the UK.
We're exploring how engineers lift things, by testing a homemade counterbalance lift.
Bob wants his castle to be like Bitz's, but things don't go to plan with Bevel in charge.