Welcome to Grand Illusions Pendulums!

For more than 25 years we have been a U.S. based leader in the design, manufacture and distribution of finely crafted Sand Pit Pendulums. Our site will introduce you to the beauty and grace of our products, describe current models, provide you with a pendulum set-up video and include contact information for sand, parts and sales.

Pendulums have mesmerized mankind for centuries.

Their powerful force was first discovered by ancient Chinese Dynasties in 200 B.C. and was used to predict earthquakes by detecting the smallest tremors. Galileo and Sir Isaac Newton studied their properties to keep time, explain the rotation of the earth and understand gravity.

What is a Pendulum and how does it work?
A Pendulum has a weight, called a bob, which is suspended from a fixed pivot point so that it can swing freely. Pendulums swing in an arc determined by the distance from the point of suspension and by the amount of momentum and the force of gravity. Start the pendulum with an initial light push and watch the pendulum swing slowly back and forth into beautiful elliptical loops and whirls. Different start angles provide different patterns. The patterns go from big to smaller then get bigger again as the arc of the pendulum changes. Place it on a table or desk, and witness the beauty and grace of gravity and momentum at work.


Where Passion and Creativity Meets Experience

We are a small team of industry veterans having decades of Experience in web Development and design

Pendulum Set-Up Video

Watch the video below on how to set up your Pit Pendulum

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If you want to know more, have questions, please contact us.

Contact details:

Grand Illusions has designed, manufactured and distributed the Pit & Pendulum since 1986. Our main office is in the U.S.
Please contact us for prices and other information.


15403 Sterling Drive; Rockville 20850 MD; USA




E-mail: RDspice@aol.com