You could accidentally glue it all to the board. After you know the slider is dry, place it back on the board , put the drawing layer back on, and out your screws back in. Similarly, what is the liquid in a Magna Doodle? The Magna Doodle is filled with a thick, opaque, white liquid of magnetic particles of iron oxide, and is covered by the drawing display screen.
The key element of the toy is the magnetophoretic display panel, filled with a thick, opaque white liquid containing tiny dark magnetic particles. These particles can be drawn to the drawing surface by a magnet-tipped stylus or optionally-provided shapes, or removed to the hidden back side by a sliding eraser bar. It works by pressing a blunt stylus into a sheet of acetate that rests atop a plane of colored wax. The acetate adheres lightly to the wax when pressed and the wax's color appears through the translucent plastic.
You can then erase your creation by simply lifting up the acetate sheet. It can be used for quick minute lessons that can fit any learning level. For a 3-year old or even 2-year-old if you feel your child can do it draw a picture of circle and square on the Doodle Pro. Which one is the square? Erase and repeat with more variations of shapes as they get better at identifying them.
Give them positive reinforcement for getting the answers right. As the child gets older, instead shapes, use letters and numbers. However, the true magic lies in the pen, specifically, the magnetic tip. The field of the magnetic pen is strong enough to infiltrate the plastic and pull the particles through the thick liquid.
When you want to start over and create something new, the magnetic eraser comes in handy. The magnetic eraser consists of a bar magnet in a plastic frame. The walls of the middle, honeycombed lattice are less than 0. Each cell of the lattice is filled with a thick liquid suspension or dispersion medium filled with tiny magnetic particles. The liquid dispersion medium is designed so that the particles can be pulled through the liquid in response to magnetic force applied by the pen or eraser, but they will not change their position float or sink due to gravity.
To do this, the liquid has special properties:. The middle layer is latticed so that there is always an even distribution of the magnetic particles across the entire surface of the display. The magnetic pen is simply a piece of plastic with a small magnet in the tip. The field of the magnetic pen is strong enough to penetrate the plastic and pull the particles through the thick liquid.
The magnetic pen is ergonomically styled so that anyone, especially little children, can grip it comfortably. The pen is usually tied to the Magna Doodle by an attached string. Some Magna Doodles also come with "shape stampers," which are simply magnets in shapes like diamonds, triangles and circles. Writing is but one use of the Magna Doodle. You must also be able to erase it, so let's look at the eraser. The magnetic eraser sits in the back of the Magna Doodle behind the display, and it can't be seen from the front.
The eraser fits in a groove on the case that allows it to slide freely from one side to the other. Let's slide the magnetic eraser across the Magna Doodle and start with a clean display.
The front of the display is blank white , and the back has all the particles. They were pulled to the back by the magnetic eraser.
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