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The Marbles set is great! Very nice quality. I used them for my ATCP PPR class to teach Kinetic and potential energy. I built a roller coaster out of popsicle sticks and hot glue. My presentation was the one to beat. Also was able to explain inertia with them. Overall its a nice set for a little off the grid fun. As an active Blogger, I received a free or greatly discounted product for the purpose of this review. The opinions are 100% mine. I have not been influenced in any way, and I only recommend products or services I use personally and believe in.
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