Retailer of science and education toys
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It needs little more designing the bottom stand part in order to let the spiral to do what is supposed to do.
I have high respect for Grand Illusions. They answered all my questions and even sent me a few replacement parts free of charge. Buy without fear :-)
It was really big pleasure to deal with Grand Illusion, I wish more deals like that !
I love your products, thanks for the amazing site.And thanks for delivering here in Brasil.
A very serious company that spend your order in South of France in less than 2 days. A detailled website with instructive videos that allows you to make an efficient choice and achieve funny physics experiment. All the best, Grand illusions !