Tricky To Open Valentine Egg Puzzle
prusaprinters
Offer your Valentine this with candy within. Shake it and say “you can have the sweets within if you can open this. If you cannot open it, and I can, I get to consume the contents.” There is a great hint as to how it opens if printed in two colors. If printed in one color, historically less than 20% will figure out the left-hand thread needs a counter-clockwise twist to open it. See also my similar egg with a right-hand thread in this contest. The loose circle in the bottom is a red herring.
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