Spinning toys and tops have uncommon behaviors. These habits all have to do with torque and angular momentum, like a bicycle wheel precessing around a rope due to gyroscopic habits.
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PhiTOP:
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A lot more resources:
http://www.nature.com/nature/journal/v416/n6879/pdf/416385a.pdf
http://iopscience.iop.org/article/10.1088/0031-9120/48/1/51/pdf
http://rspa.royalsocietypublishing.org/content/royprsa/462/2074/2897.full.pdf
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