Euler's Spinning Disk

by Toysmith

Product Features

• Just give it a spin and gravity does the rest!!
• The Euler's disk is a chrome-plated steel disk with nine pieces of magnetized holographic foil.
• A concave mirror base is the setting for the disk to spin like a coin-except it seems like it will never stop!! You won't believe your eyes or ears as the disk spins faster and louder.
• A hypnotic display of light and sound is in store for you with this awesome toy!
• Box Size: 10" x 9.5" x 1".

Product Details

• Product Dimensions: 9.8 x 9.3 x 1.4 inches ; 2.1 pounds
• Shipping Weight: 12.1 pounds (View shipping rates and policies)
• ASIN: B000239E6Q
• Item model number: 441709
• Manufacturer recommended age: 8 years and up
• Amazon Best Sellers Rank: #28,289 in Toys & Games (See Top 100 in Toys & Games)
  • #74 in Toys & Games > Learning & Education > Science > Physics
• Average Customer Review: 3.9 out of 5 stars  See all reviews (10 customer reviews)

Product Description

Fascinating Desktop Illusions -- Spin the holographic disk on the mirror - does it speed up? Listen to its rhythmic sounds. Why does the humming get louder as the speed of the disk increases? Complete with instructions and the scientific answers!

Customer Reviews

Most Helpful Customer Reviews

12 of 13 people found the following review helpful:

5.0 out of 5 stars Fascinating!, February 23, 2007

By 

W. R. Gum (Ocean City, NJ USA) - See all my reviews
(REAL NAME)   

This review is from: Euler's Spinning Disk (Toy)

I had never heard of Euler's Disk until I received it in the mail; a gift from my daughter. A simple twist of the heavy chrome-plated disk that you set on top of a concave mirror (furnished) starts it spinning at an increasing rate for at least two minutes. As it spins faster it generates a mysterious tone and changes appearance depending on which holographic magnetic designs you attach and depending on your lighting. You can Google Euler's Disk and learn how it was developed and the science behind it. But unless the manufacturer does a better job of promoting this device you will never read this revue because you won't know to look for it. Sad.

7 of 7 people found the following review helpful:

4.0 out of 5 stars Great gadget for engineers and technical types, April 8, 2008

By 

J. Olsen (Pittsburgh, PA) - See all my reviews
(REAL NAME)   

= Durability:4.0 out of 5 stars  = Fun:4.0 out of 5 stars  = Educational:4.0 out of 5 stars 

This review is from: Euler's Spinning Disk (Toy)

I am an engineer, and I enjoy showing this to my engineering and technical pals. Everyone is amazed at how long this thing spins. I bought a second one for my father.

5 of 5 people found the following review helpful:

5.0 out of 5 stars Captivating little gizmo, December 25, 2007

By 

R. Marchand (Dallas, TX United States) - See all my reviews

= Durability:5.0 out of 5 stars  = Fun:5.0 out of 5 stars  = Educational:4.0 out of 5 stars 

This review is from: Euler's Spinning Disk (Toy)

This was a Christmas gift for a 14 year old, but the whole family loves playing with it. We kept it on the table during family card games. It's fascinating to watch, especially with the interchangeable holographic magnetic sheets that you can attach to it to change the patterns. The heavy magnetic disk looks like a 3-D ball or oval as it spins, picking up speed before the disk comes to a stop. The sound shifts in intensity until it sounds almost like small motor running. Loops of light appear near the base. It's fascinating.