
I'm an artist and I bought this to practice drawing 3D shapes in different orientations. They are perfect for this purpose. I love colors and what I can see through them. The plastic feels solid and they are stable on flat surfaces. I understand they are for kids but if I cared more about accuracy I would send them back. Some shapes like the large cube, pentagonal prism, and triangular prism taper slightly by a few millimeters from end to end. The cube is barely visible, but when I unpacked it I noticed the narrowing of the prism and had to measure it to be on the safe side. This is more of a visual issue when stacking certain shapes, as one end will be flush with the other shape and the other end will not, leaving the edges protruding. Also, sizes shown are rounded up as some shapes are slightly smaller than they should be. Other forms are perfectly fine. I bought them on a deal so these flaws don't bother me. My use doesn't require precision, they are light and colorful so I keep them. If you care more than me, please note that the production is inconsistent.

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