Catch up TV
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. Maddie uses a special camera to show exactly how different patterns are made.\n\nNext, she visits a factory where we see how envelopes are made. Lots of paper is used with a very long machine called an envelope machine, which makes the envelopes really, really quickly! Maddie uses a special camera to look at the see-through film that goes over the window on the envelope and lets us see who the letter is for!
Source: CBeebies
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