This is too small for me to get my hand in and definitely too small to show to a class. Also, it loses energy fast and the rythmic motion of a good cradle is almost totally missing. I wished I had gotten a better one. :(
BOREAL.com associatePublished 08/29/2018
Thank you for your review. We're sorry that you are not satisfied with the performance of the Newtonian Demonstration. If you are looking for a Newtonian Demo that sustains energy for a longer period of time, I would suggest part number 470135-046 as the item in question is an economy version of the classic demonstration. Thank you again for your review, your feedback is important.
The large size of the Newtonian Demonstration makes a big impression and helps explain the theory.
Five Nickel-Plated Steel Balls of Uniform Mass
It's designed with durability and usability in mind. Five nickel-plated steel balls of uniform mass are suspended from a wooden frame.
Instructions are included.
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