Catch up TV
Series 4: 14. Neon Sign and Revolving Door
In today’s episode, Maddie is out and about! She finds out how revolving doors can let lots of people in and out of buildings at the same time. She visits a revolving door workshop to see how panels of glass are fixed to something called a carousel so that the panels move when we push them. Then she uses a special camera to show how a sensor at the top of an automatic revolving door spots us so it can start to turn.\n\nNext, Maddie heads to a neon sign workshop and uses her thermal imaging camera to see how glass is heated until it’s really, really hot. It can then be bent into lots of different shapes. We see how the glass tubes are filled with argon gas – when electricity passes through them, they light up!
Source: CBeebies
Most recent episodes of Do You Know?
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Series 2: 20. Kite And Wind Turbine
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Series 2: 19. Television And Carpet
In today's episode, Maddie is relaxing at home, playing games and watching television. She shows us how a television screen works using millions of tiny squares called pixels. U ...
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01-07-2025
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Series 2: 17. Bubbles And Chocolate
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Series 2: 16. Posting A Letter And Colouring Pencils
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Series 2: 15. Disco Ball And Jigsaw Puzzle
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26-06-2025
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Series 2: 14. Playground And Plant Pot
In today's episode, Maddie is having fun outdoors. First, she's in a playground learning how we keep swinging on a swing and how gravity helps us slide down a slide. She uses a ...
25-06-2025
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Series 2: 13. Hairclippers And Ballet Shoes
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Series 2: 12. Traffic Lights And Emergency Lights
In today's episode, Maddie is looking at useful lights. She shows us how traffic lights work so that vehicles can travel safely through a road junction. She visits a traffic con ...
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Series 2: 11. Aeroplane And Trainers
Today, Maddie is on the move. She gets on board an aeroplane and shows us all the buttons inside the cockpit and how they work. Then she sits alongside Bridget, a pilot, in a fl ...
20-06-2025
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Series 1: 25. Cake And Soft Play
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Series 4: 16. Forklift And Dried Fruit
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Series 3: 23. Camera And Hair Brush
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Series 2: 22. Hand Dryer And Toilet Roll
In today's episode, Maddie is looking at things we use when we go to the toilet. She visits a factory to see how hand dryers work. She shows us how infrared light is used to swi ...
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Series 2: 20. Kite And Wind Turbine
In today's episode, Maddie is outdoors finding out about things that use the wind. She finds out how a kite works when it flies high in the sky, shows us how to measure the wind ...
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Series 2: 13. Hairclippers And Ballet Shoes
Today, Maddie is dressing up. She visits a barber to find out how clippers work to cut hair. Using a special microscope camera, Maddie shows us how the blades work, and a slow-m ...
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