Average Reviews:
(More customer reviews)Pros
-- Price
-- Come in cool Octahedron shape
Cons
-- Safety hazard for young children
I got some Bucky Balls as a gift and really liked them and wanted more these small magnets. So I bought some Nanospheres as well as some Magnet Balls Original Edition - Magnetic Earth Magnet Puzzle in Collector's Tin.
From looking online at Amazon they all looked like the same thing and examining all three products they are virtually identical. So much so that they may all be from the same source. I noticed a review stating Magnet Balls were lighter, but I have a decent scale some calipers and all three products consist of Axially Magnetized; .216 gram; 5 mm spheres. There was some variation in strength, but I noticed that between batches of the same product. As far as I can tell the magnetic strength (out of the box) is the same besides if they were much stronger it would become too difficult to handle them. Two spheres will 'jump' together on a flat surface if placed within 5 mm and I was able to take a string of about 200 (of each product) and pick up three cubes (216 each).
All Three Products are good and each has an advantage.
A few of pages of examples would benefit all these products (and cost next to nothing to add), but the main fun is creating your own magnetic sculptures.
Bucky Balls have the best container (small plastic cube which can be used to 'cut' into bunches or strings of balls and an instruction sheet which is nice, but are by far the most expensive.
Magnet Balls Original Edition - Magnetic Earth Magnet Puzzle in Collector's Tin are well priced (about the same per ball as Nanospheres) and come in a cube packed in a 'tin'
My choice (the least expensive by a very small margin) is this product NanoSpheres particularly as they come in a cooler shape the Octahedron
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Original Nanospheres, 231 Rare Earth Magnetic Balls
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