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Incredible Shrinking & Growing Head

It's an unbelievable optical illusion!

  • Incredible Shrinking & Growing Head Illusion
    Item #: WGSH-100

    $49.99 In Stock

Usually ships out the next day.

Recommend for 10 years & up with adult supervision.

You have to see this illusion to believe it... your head actually looks like it's inflating like a balloon! The audience is instructed to stare at the large, spinning disk - it's 38 cm (15 in) in diameter. It's almost hypnotic as the spinning spiral pulls you into the illusion. All of a sudden the presenter says, "Look at my nose!" To everyone's amazement, the presenter's head appears to grow - like a balloon being inflated. It's an amazing optical illusion that will instantly become one of your favorite science demos. This version comes complete with the specially printed disk and a battery operated motor. Recommended for children ages 10 and up (for demonstration).

What's included?

  • Special spiral disk
  • Cordless, battery operated screwdriver
  • Screwdriver adaptor and screw
  • Activity guide

What does it teach?

This amazing demonstration is a great introduction to the science of optical illusions.

Shrinkiing head illusion

Aaron    -  November 12, 2011

1 2 3 4 5
This user gave 5/5 stars


Great illusion. I used with with 300 students at a Junior High school assembly and blew them away. Thanks and I am interested in these types of illusion.

Great illusion but remember a few things!

Vincent    -  July 5, 2010

1 2 3 4 5
This user gave 3/5 stars


Great illusion and it does what it says but...
First, you need a rechargeable electric drill to spin the circle at a constant speed. I am from Canada. I went to three stores. The cheapest for me was $40.00.
Second. It does not work for everyone. Even if you give detailed instructions for your audience.
Third. You have to be in front of the disk and at a certain distance for maximum effect.
Let's be clear about this. It is best for a larger audience.
This is the truth and I'm sticking to it.
 

This review is about the Growing Shrinking Head demonstration.  Our product comes with the necessary components to perform the demonstration.

- Spangler Science Team

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