This is a puzzle supposedly design by Isaac Newton. This puzzle is extremely hard to do correctly. Obviously, you can just take the tube out of the case. The real challenge of this puzzle is taking the tube out of the case without touching the case or knocking the puzzle over. Sometimes a little strand of filament is left on the top of the rocket that you can use to pull it out, but this is not technically the correct method.
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The author marked this model as their own original creation.