Catch up TV
Series 4: 6. Radio Telescope and Maze
Today, Maddie is finding things! First, she visits an observatory to see how a really big radio telescope uses powerful computers to collect radio waves from space and turn them into a picture we can see. She uses a special time-lapse camera to see how the telescope moves up, down and around as it finds the radio waves.\n\nNext, Maddie heads to a giant maze, where she starts at the entrance and tries to find the middle! She then heads to a craft workshop to see how a wooden maze is made using something called a maze blank. She uses her special slow-motion camera to see the wood shavings flying off as a special device called a CNC machine drills out the maze path onto a block of wood.
Source: CBeebies
Most recent episodes of Do You Know?
Do You Know?
Series 4: 15. Climbing Wall And Modelling Clay
Today, Maddie is learning about colourful things! She visits a climbing wall centre, where she finds out how colourful holds on the wall help us to climb up it. And we learn how ...
02-07-2022
CBeebies
Do You Know?
Series 3: 15. Clouds & Rain And Radiator
In today’s episode, Maddie is finding out about the weather. She discovers why we have clouds and rain and how the water cycle works. We learn there are lots of different ...
01-07-2022
CBeebies
Do You Know?
Series 3: 14. Digestion And Meringue
Maddie learns what happens to food in our bodies when we eat it and why it’s important to eat a variety of different foods from different food groups. We find out which fo ...
30-06-2022
CBeebies
Do You Know?
Series 3: 13. Beehive And Mug
Maddie visits beehives on the roof of a building in the city. She finds out how honey bees make honey in the hive. Maddie puts on a special beekeeping suit before the beekeeper ...
29-06-2022
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 ...
28-06-2022
CBeebies
Do You Know?
Series 3: 11. Cereal And Potato Harvester
Maddie visits a farm to show us how a potato harvester works - picking out and sorting the potatoes growing in the ground. She uses her special cameras to see how the machine pu ...
27-06-2022
CBeebies
Do You Know?
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 ...
26-06-2022
CBeebies
Do You Know?
Series 4: 13. Kaleidoscope And Envelope
In today’s episode, Maddie is looking inside things! We look inside a kaleidoscope to learn how it uses three mirrors called a triangular prism to make colourful patterns. ...
25-06-2022
CBeebies
Do You Know?
Series 3: 10. Wind-up Toy And Cricket Bat
In today’s episode it’s playtime! Maddie is finding out about wind-up toys and how they move along. We see inside a wind-up truck and Maddie uses her special cameras ...
24-06-2022
CBeebies
Do You Know?
Series 3: 9. Hearing Aid And Whistle
In today’s episode Maddie is listening for sounds. First, she discovers how wearing a hearing aid can help us hear more clearly. She meets 7 year old Zara who uses a heari ...
23-06-2022
CBeebies
Most popular episodes of Do You Know?
Do You Know?
Series 1: 15. Crane And Bricks
Maddie visits a building site. She uses a special camera to see how a big crane works to move heavy objects from one place to another. An animation shows how the hydraulic mecha ...
22-04-2022
CBeebies
Do You Know?
Series 1: 10. Water Park And Ice Cream
Maddie goes for a fun day out. She visits an indoor water park and uses a special waterproof camera and animation to show how a water slide works. She then goes underneath the s ...
15-04-2022
CBeebies
Do You Know?
Series 1: 9. Hot Water And Toothpaste
Maddie is preparing for bath time. She uses a special thermal-imaging camera to find out how the hot water system in a house works and then visits a reservoir to see where the w ...
14-04-2022
CBeebies
Do You Know?
Series 3: 14. Digestion And Meringue
Maddie learns what happens to food in our bodies when we eat it and why it’s important to eat a variety of different foods from different food groups. We find out which fo ...
30-06-2022
CBeebies
Do You Know?
Series 3: 4. Day And Night And Solar Panel
Maddie explains how the Sun doesn’t move when we go from day to night, but how it’s the Earth turning on its axis that makes the sun appear in the morning and go awa ...
16-06-2022
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 ...
06-05-2022
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 ...
31-05-2022
CBeebies
Do You Know?
Series 3: 3. Car Engine And Car Transporter
In today's episode Maddie finds out about cars. She heads to a car engine factory and with her special cameras finds out how blocks of aluminium metal are melted and made i ...
15-06-2022
CBeebies
Do You Know?
Series 3: 9. Hearing Aid And Whistle
In today’s episode Maddie is listening for sounds. First, she discovers how wearing a hearing aid can help us hear more clearly. She meets 7 year old Zara who uses a heari ...
23-06-2022
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 ...
03-05-2022
CBeebies