After I Buy 3B Scientific 50 Piece Organic Chemistry Molecular Model Student SetI'm not sure what's up with other people's kits, but mine is exactly what I wanted. Other kits use wood or springs and they don't fit well into the atom balls. These plastic bonds snap in and bend nicely for doing double and triple bonds. They hold together for manipulating the molecule to visualize the Newman projections and chair conformations. I'm happy! Also, I used my amazon prime and it arrived in two days, so I didn't have to wait long at all. I only wish I'd ordered it at the beginning of the semester.
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