
Two teams touch down at the STARS space station to take on three scientific challenges to win out-of-this-world prizes. First, they must decide whether objects will float or sink in a water tank. Then, there’s a game based on sound and pitch as Sam and Ayo play a tune using three hidden jars filled with different volumes of water. The teams must then figure out which order the jars go in to make the tune. Finally, the teams must work out which season James is talking about by standing under the correct tree. If they’re right, they’ll get covered in spring blossom, summer sunlight, autumn leaves or winter snow! \n\nIn the lab, Ayo is challenged to defy gravity using just a cup, some water and a piece of card.
Source: CBeebies
Series 3: 9. Water Bears In Space
Two teams take on three scientific challenges based on heavier or lighter, the human body and gravity. James makes a nature documentary about microscopic water bears.
27-06-2026
CBeebies
Series 3: 8. Extra Special X-ray
Two teams take on three scientific challenges based on coding, animal habitats and pollination. Ayo can’t find her special pen anywhere. Where can it be hiding?
21-06-2026
CBeebies
Series 3: 7. Lost In Space
Two teams take on three scientific challenges based on sound pitch, maps and healthy eating. James, Ayo and Sam are surprised when space rubbish slides down the chute!
20-06-2026
CBeebies
Series 3: 6. Slippy Shoes
Two teams take on three scientific challenges based on floating or sinking, fossils and forces. James’s shoes are slippy, but Ayo and Sam help find a solution with a moon ...
14-06-2026
CBeebies
Series 3: 5. New Inventions
Two teams take on three scientific challenges based on sound and pitch, plants and the solar system. The team discovers that not all inventions need to be new.
13-06-2026
CBeebies
Series 3: 4. Handwashing Rap
Two teams take on three scientific challenges based on coding, seasons and gravity. Sam shows James and Ayo his new handwashing rap.
07-06-2026
CBeebies
Series 3: 3. Funny Bones
Two teams take on three scientific challenges based on float or sink, plants and bridges. James, Ayo and Sam look at different animal skeletons, and Sam hosts a fun quiz!
06-06-2026
CBeebies
Series 3: 2. Robot Dog
Two teams take on three scientific challenges based on heavier and lighter, shadows and pollination. Sam brings a new pet to STARS - a robot dog called Rover - but has lost its ...
31-05-2026
CBeebies
Series 3: 1. Microscopic Marvels
Two teams take on three scientific challenges based on the senses, seasons and memory. James, Sam and Ayo enjoy a fun STARS art challenge, and Sam uses a telescope to make uniqu ...
30-05-2026
CBeebies
Series 1: 1. Exercising
Two teams touch down at the STARS space station to take on three scientific challenges to win out-of-this world prizes. First, they must work out if an object is heavier or ligh ...
11-01-2026
CBeebies
Series 3: 7. Lost In Space
Two teams take on three scientific challenges based on sound pitch, maps and healthy eating. James, Ayo and Sam are surprised when space rubbish slides down the chute!
20-06-2026
CBeebies
Series 3: 9. Water Bears In Space
Two teams take on three scientific challenges based on heavier or lighter, the human body and gravity. James makes a nature documentary about microscopic water bears.
27-06-2026
CBeebies
Series 3: 8. Extra Special X-ray
Two teams take on three scientific challenges based on coding, animal habitats and pollination. Ayo can’t find her special pen anywhere. Where can it be hiding?
21-06-2026
CBeebies
Series 3: 5. New Inventions
Two teams take on three scientific challenges based on sound and pitch, plants and the solar system. The team discovers that not all inventions need to be new.
13-06-2026
CBeebies
Series 3: 2. Robot Dog
Two teams take on three scientific challenges based on heavier and lighter, shadows and pollination. Sam brings a new pet to STARS - a robot dog called Rover - but has lost its ...
31-05-2026
CBeebies
Series 1: 23. Defying Gravity
Two teams touch down at the STARS space station to take on three scientific challenges to win out-of-this-world prizes. First, they must decide whether objects will float or sin ...
28-12-2025
CBeebies
Series 1: 25. Leonardo Da Vinci
Two teams touch down at the STARS space station to take on three scientific challenges to win out-of-this-world prizes. First, they must guide magnetic rockets out of the Magnet ...
04-01-2026
CBeebies
Series 2: 2. Space Worms
Two teams take on three scientific challenges based on coding, shadows and pollination. STARS is almost out of space lettuce, but James has an ingenious way to grow some more.
16-03-2025
CBeebies
Series 1: 20. Measurements
Two teams touch down at the STARS space station to take on three scientific challenges to win out-of-this-world prizes. First, they must guide magnetic rockets out of the Magnet ...
20-12-2025
CBeebies
Series 2: 4. Young Scientist Club
Two teams take on three scientific challenges based on coding, animal habitats and healthy eating. Sam receives a video call from two members of his Young Scientist Club on Earth.
23-03-2025
CBeebies