science

Magna Doodle

Magna Doodle is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Magna Doodle rather than just read about it. In short: Magna Doodle is a magnetic drawing toy, consisting of a drawing board, a magnetic stylus, and a few magnet shapes. Invented in 1974 by Pilot Corporation, over forty million units have been sold to date worldwide, under several brands, product names and variations, including Tyco and Mattel/Fisher Price.

Key takeaways

Magna Doodle belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Magna Doodle to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Magna Doodle from memory before moving on to harder problems.

Reference excerpt

Magna Doodle is a magnetic drawing toy, consisting of a drawing board, a magnetic stylus, and a few magnet shapes. Invented in 1974 by Pilot Corporation, over forty million units have been sold to date worldwide, under several brands, product names and variations, including Tyco and Mattel/Fisher Price.

How it works

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. The middle layer is divided into a honeycomb of cells, keeping the liquid static and the particles evenly distributed across the panel. The liquid is formulated so that the floating particles can be pulled through it in response to the magnetic forces, but not due to gravity.

Brand The toy was originally invented at Pilot Corporation, which registered "Magna Doodle" as a trademark in the U.S. in 1986, and has owned the underlying rights to the brand ever since. Magna Doodle toys were produced under license by Tyco, using panels produced by Pilot, until 1997, when Tyco was purchased by Mattel. Mattel then sold the toy under its Fisher-Price brand. Following a dispute over the price of the panels, Mattel ended the licence agreement in 2003, but then began selling a new product called the Doodle Pro which used third-party panels and similar packaging. This led to Pilot suing Mattel unsuccessfully in 2004 for infringement of its trademark and trade dress, while relicensing the brand to the Ohio Art Company. Ohio Art, in turn, eventually dropped the license as well, later producing the similar Doodle Sketch until 2016 when it sold that brand along with Etch A Sketch to Spin Master. The current licensee of the Magna Doodle brand is Cra-Z-Art.

In popular culture In the TV comedy Friends, a Magna Doodle is visible in Joey and Chandler's apartment, with various messages written on it throughout the series, referencing plot points, current events, inside crew jokes, or just random drawings. A version of the Magna Doodle was used in the 1990s game show Nick Arcade during their "Video Challenge" games. Before the challenge would begin, a contestant would write on the drawing board how many of the team's points they would risk on their teammate being able to successfully complete the challenge. The wager was kept secret until after the challenge ended.

CD-ROM version In 1999, Mattel Media released a CD-ROM version for Windows-PCs. AllGame gave the product a rating of 1.5 out of 5, writing: "Magna Doodle is completely unenjoyable. Mattel Media has taken a terrific toy and stripped it of any real fun."

See also Etch A Sketch, a somewhat similar toy using a different principle of operation

References

Illustrations

Worked examples

Example 1 — a first encounter with Magna Doodle

Start with the simplest possible case. Write down what Magna Doodle claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Magna Doodle before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Magna Doodle ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Magna Doodle

In research: Magna Doodle appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Magna Doodle in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Magna Doodle is common in secondary-school and first-year university syllabi. It links to neighbouring topics Art and craft toys, Magnetic devices, so understanding it makes those chapters shorter.
In everyday life: Look for Magna Doodle outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Magna Doodle in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Magna Doodle means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Magna Doodle out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Magna Doodle in simple terms?

Why does Magna Doodle matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Magna Doodle?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Magna Doodle.