Baffling Puzzle Ball

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Its two mind-bending enigmas, a racing game, a ball, and a safe all combined into one. First, see who can put it together in the least amount of time possible. Then, once assembled, challenge your friends to take it apart. It's almost impossible when you don't know the secret. Unlike most interlocking puzzle balls, this one uses an entirely new, unique, and previously unpublished secret to make it work. There is no single key piece. Made from 6 identical interlocking pieces, once assembled, the ball expands or contracts as the 6 interlocking pieces are pulled apart or pushed together. Most puzzlers will quickly see how the pieces fit together to form the ball. The challenge lies in the physical dexterity required to orient, position, and coordinate all six pieces precisely enough to slide them together. Once mastered, it's fun to see who can assemble the ball the fastest. Challenge your friends and family to a competition to see who is the quickest. There are at least two different solutions for quickly assembling the puzzle. Once assembled, it becomes a magic ball with a secret compartment inside that can only be opened by the owner. This moderately difficult puzzle ball will challenge both your physical dexterity and puzzle-solving logic. Children today are losing their motor skills from spending too much time on computers and not enough time engaging in various physical activities. Here's a toy for children to play with, improve their dexterity, and exercise their brains while having fun. Take this toy anywhere for hours of entertainment without electricity or the internet. It's also great for rehabilitation and regaining lost motor skills. Fast and easy to print; no supports required; no waste generated. Scalable. Prints in about 1.5 hours on most printers. Instructions: Print 6 copies of the supplied file. Choose a variety of colors to create your own unique look. It's scalable, but I recommend using the supplied scaling as a starting point. Use a 0.2 mm layer with 25% infill. The material cost is approximately $1. For a more challenging puzzle (tighter fit), scale the Z dimension up by a few percent; for an easier puzzle (looser fit), scale the Z dimension down by a few percent. I've posted the solution on my YouTube channel. Please don't look unless you've given up and are completely stuck. For a hint, see my 3-piece hexagon puzzle; it uses the same secret, but in a simpler two-dimensional way. https://youtu.be/eD3CuDpwa7k