Labs Center of Mass, Double Cone and Plane Demonstration & Toy - 17' Long

It should be miniature sized and made with plastic material.

Great product! It amazes my students and creates great science inquiry questions. Very well built.

A very creative, simple, and more importantly, counter-intuitive device that helps learning through surprise and imagination. The first step for learning is not clarity, is confusion. And this tool fully complies with this.I recommend 100%. (Sorry for my bad english))

Well constructed. The path the double cone travels is not quite as long as I was expecting and I see the product description was updated after my purchase to show the length of the item not its packaging. The actual path the cone travels is approximately 11 inches ( from point where the double cone won't fall out of the track to the notch ) . Would have been nice if a regular dowel was included; adds to the fun because it rolls in the opposite direction of the double cone. Still happy to have it.

It's a wonderful classroom demo.

This is art and science beautifully combined. I am going to buy another one for a gift.