Catch up TV
Series 3: 5. Singing and Trombone
Maddie visits a singing group and the children help us find out how we use our mouths, vocal chords and lungs to make different sounds when we sing and speak. Maddie uses a special machine to measure the different high and low sounds that we make. Next, she visits a trombone factory to see how copper and zinc metals are made into brass trombones. We see how the parts are bent and moulded into different shapes to make the new parts of the trombone and Maddie uses a special gadget to measure the temperature and find out how the metals are heated and stuck together.
Source: CBeebies
Most recent episodes of Do You Know?
Do You Know?
Series 4: 5. Drinking Water And Carrot
In this episode, Maddie visits a reservoir that collects water from our homes, natural springs and the rain. She heads to a draw-off tower, which takes water from the reservoir ...
26-07-2024
CBeebies
Do You Know?
Series 4: 4. Hula Hoop And Tent
Maddie is playing outdoors. She finds out how we move our bodies to keep a hula hoop up in the air and learns how a hula hoop uses something called centripetal force to keep it ...
25-07-2024
CBeebies
Do You Know?
Series 4: 3. Electric Car And Wind
Maddie visits an electric car factory to find out how an electric car works. She learns that an electric car uses batteries and electricity to make the energy it needs to move. ...
24-07-2024
CBeebies
Do You Know?
Series 4: 2. Bird's Nest And Helmet
In this episode, Maddie learns all about strong structures. She goes to a nature reserve to find out how a bird makes its nest using twigs, moss, leaves and dried grass. She als ...
23-07-2024
CBeebies
Do You Know?
Series 4: 1. Starlight And Stop-frame Animation
In this episode, it’s night-time! Maddie visits a planetarium to learn how stars work. She discovers that stars are made in space by dust and gas, and when they press toge ...
22-07-2024
CBeebies
Do You Know?
Series 4: 20. Speaker And Colour
Today, Maddie is using her senses to see and hear! She visits a speaker factory to understand what happens when we listen to music from a speaker. With the help of her special s ...
19-07-2024
CBeebies
Do You Know?
Series 4: 19. Lamp And Playhouse
Today, Maddie finds out about things you might have in your home! She visits a lamp workshop to discover how a lamp lets us see in the dark. She learns that inside a light switc ...
18-07-2024
CBeebies
Do You Know?
Series 4: 18. Airport Baggage And Rucksack
Today, Maddie is learning all about baggage! She visits an airport to see how baggage goes from the check-in desk and onto an aeroplane using something called a destination tag, ...
17-07-2024
CBeebies
Do You Know?
Series 4: 17. Car Ferry And Globe
In today’s episode, Maddie learns about land and water! Maddie visits a port to find out how cars are loaded onto a ferry so they can be carried across the water. She then ...
16-07-2024
CBeebies
Do You Know?
Series 4: 16. Forklift And Dried Fruit
In today’s episode, Maddie visits a forklift warehouse. She discovers how a forklift truck uses something called counterbalance to lift things really high without tipping ...
15-07-2024
CBeebies
Most popular episodes of Do You Know?
Do You Know?
Series 2: 21. Fish Tank And Bath
In today's episode, Maddie finds out about things that use water. She visits an aquatic centre to show us how a fish tank works, using a special underwater camera to explain how ...
06-06-2022
CBeebies
Do You Know?
Series 1: 3. Fizzy Water And Yoghurt
Maddie looks at food and drink. She uses a special slow-motion camera to find out how bubbles get inside a bottle of fizzy water. Animation shows how gas is used to create the b ...
06-04-2022
CBeebies
Do You Know?
Series 1: 25. Cake And Soft Play
Maddie is getting ready for a party. She uses a special camera and animation to find out how cake ingredients work together to make cake sponges rise in the oven. Next, Maddie v ...
03-05-2023
CBeebies
Do You Know?
Series 1: 20. Eggs And Bread
Maddie is making breakfast in the kitchen. She visits a farm to see where eggs come from and uses a special thermal imaging camera to show why eggs change colour when they're co ...
26-04-2023
CBeebies
Do You Know?
Series 2: 17. Bubbles And Chocolate
In today's episode, Maddie is having a party! She finds out how bubbles work when we blow into bubble mixture. She shows us how the surface tension of water changes when we add ...
31-05-2022
CBeebies
Do You Know?
Series 3: 6. Bridges And Playground Flooring
In today’s episode Maddie is going high and low! She takes her special 360 camera to the top of the longest suspension bridge in the UK to find out how it works. Maddie di ...
13-11-2023
CBeebies
Do You Know?
Series 3: 12. Bowling Alley And Ribbon
Maddie heads to a bowling alley to find out how it works. She takes her special cameras and looks behind the lane to see where the pins end up and how they get put back in the r ...
21-11-2023
CBeebies
Do You Know?
Series 1: 22. Escalator And Wheelbarrow
Maddie is at a shopping centre. She uses special cameras to find out how an escalator works to move people from one floor to another. An animation shows the hidden cogs and chai ...
28-04-2023
CBeebies
Do You Know?
Series 3: 16. Metal Recycling Centre And Road Sign
Today Maddie is learning about metal, and how it can be recycled and used again. Maddie visits a recycling centre where they recycle metal from old cars. She uses her special ca ...
27-11-2023
CBeebies
Do You Know?
Series 1: 6. Cat Flap And Woolly Hat
Maddie meets some furry friends. She uses special cameras to find out how a digital cat flap works and how a tiny microchip unlocks the cat flap so the cats can go in and out of ...
06-04-2023
CBeebies