The Heptagon is a twisty puzzle of the "Hockey Puck" type. It has seven-fold symmetry and it shapeshifts, which results in some unexpected states and moves.
Watch the YouTube video
Read at the Shapeways Forum
Read more at the Twisty Puzzles Forum
Please order a 3D-printed do-it-yourself puzzle kit from Shapeways at this page (check with Oskar about screws and stickers), or contact Oskar
directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.