Katamari Kube (by Mowens + Kantibus)

As with other designs by Mowens, the puzzle consists of slowly removing parts, one by one, until you get to the hidden chamber deep inside. The whole thing is made of 3D printed material, even a makeshift spring mechanism. There are a few tools along the way, making this a minor Sequential Discovery puzzle as well as a disassembler.

The 'Katamari' aspect is based upon the video game 'Katamari Damacy' - which is a game that involved rolling a 'sticky ball' to roll up all manner of things, to grow the ball larger. Because of how much rotation this puzzle involves, as well as slowly disassembling it to get to the core, it's a fitting reversal of Katamari Damacy's gameplay.

This version includes a prize item that is appropriately themed, as well.

Both the Katamari Kube and the Gravity Box share the same design / number of moves to solve: Eighty! It's intensely tricky, thanks to many gravity-based pieces moving within the puzzle as you manipulate and move the cube to see what you're doing. Some small tapping might be required to get a finicky gravity-based part to fall into place at times.

Some of the smaller internal 3D printed parts are fragile if handled with excessive force, but this copy will come with some spare parts, in case of accidental breakage by any future solvers. (Spare parts not pictured to avoid potential spoilers)

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The front side of the info card text reads as follows: 

THE UNIVERSE IS IN PERIL

Prince Katamari fell asleep and dreamt of his favourite toy, the alphabet block. - When he woke up, his Katamari Level 12 ball was gone!

It had been sucked into his psychic manifestation in the cosmos!

So you must help him by rolling the square kube in your hands as it is too big and clumsy for him to roll now.

Once you use the tools of the galaxy to unravel the mystery of the children's block, you will finally release the level 12 katamari ball and he can avoid punishment from dear old dad!

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The back side reads:

HOW YOU CAN HELP

Rules:

Do not force anything, including plates.

Many internal parts are made to move on their own, if you are having trouble making a move happen, or have done it before: try tapping, or turning the kube in another direction as some mechs are orientation-based .

Some parts are solid plastic, so if you break them you are trying way too hard.

Always look around at all visible paths and mechs you have accessed already, some parts may move slow due to precise fitment, but none will require force.

Hints:

Take notes, you will not solve this one quickly. 

Have fun!

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The 'Gravity Box' is available in its current form here: https://www.mowens995.com/puzzles/p/gravity-box

Here is the description of the 'Gravity Box' from the above URL: 

'My most complex and experimental design (yet). This box has it all - gravity locks, gears, tools, a spring, all built into seven sliding panels.

Only 22 pieces but requiring 80 moves to solve, this is a very dense puzzle. Lots of small movements and covered mechanisms present a tough challenge.'

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The red side of the cube has a slight but noticeable imperfection in the 3D printing, which appears as an irregular curving seam of sorts, but this does not affect the puzzle in any way.

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The winner of the auction is responsible for paying the shipping costs. DO NOT PAY until after the shipping cost has been determined and added to the invoice.