Tippe top
thingiverse
Tippe tops, also referred to as inverting or flip tops, have been known to entertain nuclear physicists such as Niels Bohr and Wolfgang Pauli. For more information, visit the tippe top's Wikipedia page at http://en.wikipedia.org/wiki/Tippe_top. To achieve inversion, I adjusted the parameters of an openscad script due to unavailable ideal proportions online. Further enhancements may be possible for optimal tippiness. Assemble by printing two halves with 100% solidity and gluing them together.
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