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Book 26, Question 112 · Video

Why do designers draw an invention on a computer first?

Video · 1:48 · Crafty Clover explains, from A Million Whys Book 26

Computer-aided design, or CAD, is software that lets designers draw shapes in three dimensions. They can rotate them, measure parts, and check whether pieces fit together. Changes are easy, and no material is wasted. The drawing can then be sent to machines that cut or print the parts. CAD is used for everything from toys to airplanes.

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do designers draw an invention on a computer first?

The Big Idea

Many inventions start as drawings on a computer! Designers use special software. It's called CAD.

3D Drawing

Step one: 3D Drawing. Computer-aided design, or CAD, is software that lets designers draw shapes in three dimensions. They can rotate them, measure parts, and check whether pieces fit together.

Easy Changes

Step two: Easy Changes. Changes are easy, and no material is wasted. Designers can try many ideas.

To Machines

Step three: To Machines. The drawing can be sent to machines that cut or print the parts. CAD is used for everything from toys to airplanes.

A Closer Look

Let's take a closer look! Draw shapes. Spin them around. Check sizes. Print the parts.

Quick Facts

Quick facts! Some free CAD programs are made for kids. No wasted material. Send to a 3D printer. Used for airplanes.

Think Like a Scientist

Now, think like a scientist! Look at a cup. Sketch its front view on paper. Sketch its side view. Sketch its top view. That's how CAD drawings begin!

Outro

Designers draw inventions on a computer with CAD software first, so they can rotate, measure, and fix designs without wasting material, then send them to machines that cut or print parts. It is like building with digital clay before making the real thing. Science is amazing! Keep wondering and keep exploring! Share what you learned with someone at home, and see what they think! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

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