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Expanding Cube   . . . Stewart Coffin's creation . It was the first copy made .   By sheer gravity design, after initial connection, all the pieces close in towards the center .   One only needs to grasp the puzzle by two of its pieces to start all of them expanding until total disengagement is reached, thus making it a true coordinate-motion puzzle .


Expanding Cube . . . expanded slightly


Expanding Cube . . .
single piece
( 1 of 6 )
















Expanding Cube   . . . made by Skor-Mor from their Geo-Logic line - whose inner structure is taken from Stewart Coffin's design in his hardwood version by the same name !


Expanding Cube . . . plastic . . . expanded slightly


Expanding Cube . . . plastic . . . single piece
( 1 of 6 )
















Lucky Star  . . . from Bits & Pieces online catalog .
An interlock coordinate-motion puzzle ( all the pieces move equally at the same time ) designed by Philippe Dubois who uses it as his logo.

Lucky Star . . . expanded slightly


Lucky Star . . . expanded more


Lucky Star . . . pieces



















Pandora's Box   . . . from  Pentangle of England .
A high-quality coordinate-motion puzzle .


Pandora's Box. . . partially opened





















Boomerang Burr   . . . imploded
One of my creations !
Original burr is called  'Banana Burr' .   Interesting exercise in shape-changing 'explosion-type' coordinate motion,   utilizing 45 and 90 angles, with North American Eastern white pine, kiln-dried at about 8% humidity .
There were several areas on each of the pieces (not on any slide portion) I applied several coats of clear gloss polyurethane, just to enhance its aesthetics by way of contrast from other areas . . . such as the contrast between natural blonde-color to flame-torched areas .


. . . starting to expand . . .


. . . expanding more . . .








. . . fully expanded


Boomerang Burr . . . "UNVEILED"



















Cerebral Rings . . . from  Mag-Nif Inc.

Pieces













partial opening


piston