Book 21, Question 41 · Video
How Do Magnetic Drawing Boards Work?
A magnetic drawing board lets you draw a picture and erase it with one swipe. It looks like magic, but it is really a clever trick with magnets and tiny cells of powder.
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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. How do magnetic drawing boards work?
The Big Idea
A magnetic drawing board lets you draw a picture and erase it with one swipe. It looks like magic, but it is really a clever trick with magnets and tiny cells of powder. Let's find out how it works!
Cells Full of Powder
Step one: cells full of powder. A magnetic drawing board has tiny cells filled with dark magnetic powder and a light liquid. They sit under a thin window, and the powder usually rests at the bottom.
The Magnet Pen
Step two: the magnet pen. The pen has a magnet in its tip. When you draw, the magnet pulls the powder up to the window and leaves a dark line behind it.
Slide to Erase
Step three: slide to erase. A slider on the board has a magnet that pulls the powder back down. The picture disappears, and the board is ready for a new drawing.
A Closer Look
Let's take a closer look! The window is on top. Tiny cells hold magnetic powder. The pen lifts powder to the window. The slider pulls it all back down.
Quick Facts
Quick facts! You can erase the whole picture with one swipe. That is because every cell resets at once. The pen tip holds a magnet. And the dark powder does the drawing.
Think Like a Scientist
Now, think like a scientist! Draw a smiley face on a magnetic board. Erase it with the slider. Explain to someone else why the pen needs a magnet. Then draw something new! Then tell a friend what you found out.
Outro
A magnetic drawing board uses a magnet pen to pull dark powder up, and a slider to pull it back down. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!