Sequential discovery puzzle

Object is to separate key and nut. This design was an entry into the 2005 IPP design contest.

This is the mass-produced version

This is Iwahara's Karakuri Club 2008 Christmas present. Unusual design with 2 hidden compartments - the first being pretty easy to get to, and the second being pretty hard

Matt Dawson's IPP 30 puzzle exchange as crafted by Robert Yarger. Limited edition of 18. Works beautifully. Includes original box and solution.

One of the original Creative secret boxes from Karakuri Creation Club.CS-8There are 2 "Kannuki (bar)" like usual Secret Box. Therefore it's easy to move them. But, the next movement is different from usual ones. You will feel that the plates are a little loose, but you can't slide them.

All the 25 circle pieces has to put back in the circle tray. The circle pieces has different sizes and the puzzle is very very difficult to solve.There are three solutions. I can send you the images of the solutions if you would like.Shipping cost is < 500g world 5.25 $

This puzzle will be only sold only to those persons who are not taking part at the IPP exchange in Tokyo this year!! (Laser cut plastic three layers, 3.75" x 6.75" x 3/8"; thickness are base 1/8", tray edge 1/8", pieces 1/8" back with 1/8" figures) Problem 1: Exchange the clouds and sheep; here are every 7 steps of a 96 rectilinear steps, 114 straight-line steps solution (108 straight-line steps, are also possible): Problem 2: Also exchange the rabbit and the sun; here a...

It is a puzzle from the 80s and is patented by Claus Fohlmeister. It is a coin bank. To open the bank you have to know the trick, but it is not a simple trick .You need more then 4 steps before you can open it!!!Shipping cost is< 500g world 5.25 $< 1kg world 10.5 $ I will combine shipping cost if you have more then one puzzle.You have to pay the paypal fees.

From Eric Fuller's description: The half hour puzzle is a Stewart Coffin classic, and if you don't have a copy in your collection you really should. Although this puzzle is fun and approachable by anyone, it's far from simple. The pieces were deliberately chosen to be as tricky as possible, and there is only one solution. Mr. Coffin has this to say about it: "The six-piece version of the 3 x 3 x 3 cube will be considered first. For aesthetic reasons, one might prefer that all the pieces be the ...

Missing Link - designed by David Hirsch, made by Philos Spiele. Comes with instruction sheet, not shown in photo. You can actually make a pyramid with the eight pieces, too, and there are solutions which require color constraints listed on the solution sheet. The basic idea is to assemble the pieces such that the light/dark pattern on opposite sides is identical. Don't know why it's called "missing link", since that confuses it with the old plastic puzzle of the same name. Don't remember when I ...

Description : Odd repartition is a 9 pieces burr. 9 moves to remove the first piece and 13 for the second. The disassembling is a real challenge, but the reassembling is more complex because of the "odd" distribution of the pieces in the final shape. You will find some tricky situations.All pieces are made in a single block of wood.No solution provided.The same photos are used for the 13 "odd repartition" but there is some differences (darker, lighter ...) between each puzzles. S...

Description : Odd repartition is a 9 pieces burr. 9 moves to remove the first piece and 13 for the second. The disassembling is a real challenge, but the reassembling is more complex because of the "odd" distribution of the pieces in the final shape. You will find some tricky situations.All pieces are made in a single block of wood.No solution provided.The same photos are used for the 13 "odd repartition" but there is some differences (darker, lighter ...) between each puzzles. S...

Description : Another of Guy Brette's devious designs, this twelve piece burr has two different stick lengths and an interesting "cross" finished shape. It's also quite difficult with a whopping level 9.9.9 solution. (description by Eric Fuller) All pieces are made in one part, no added block glued. No solution provided. Size : 6 cm x 8 cm Materials : Cherry and Wenge Designer : Brette Guy Craftsman : Vigouroux Maurice

Description : Odd repartition is a 9 pieces burr. 9 moves to remove the first piece and 13 for the second. The disassembling is a real challenge, but the reassembling is more complex because of the "odd" distribution of the pieces in the final shape. You will find some tricky situations.All pieces are made in a single block of wood.No solution provided.The same photos are used for the 13 "odd repartition" but there is some differences (darker, lighter ...) between each puzzles. S...

Description : Daedalus seems to be a classic interlocking 3x3x3 cube, but, on the internal hidden faces, pins inside grooves, can define it, like an internal evolutionary maze. When a piece moves, a part of the maze moves with. Each unit of the cube has edges cut which permit rotations. All the possible moves can be used. One unique solution, level : 49 (23, 9, 8, 3, 3, 1, 2) rotations required. A booklet of the solution, step by step, is provided. This puzzle was an entry of the...

Open Window, exchange puzzle for IPP32, designed by Tom Jolly, mfg Tim and Carol Udall. Four sliding pieces in a frame (well...three after you pop out the key piece) with a slightly tricky solution. Harder to reassemble, especially if you didn't see it taken apart. There was another version of this with a closed back, but I only made 2 of them. This one, both sides are open. Weighs 10 oz with shipping box.

Description : Daedalus seems to be a classic interlocking 3x3x3 cube, but, on the internal hidden faces, pins inside grooves, can define it, like an internal evolutionary maze. When a piece moves, a part of the maze moves with. Each unit of the cube has edges cut which permit rotations. All the possible moves can be used. One unique solution, level : 49 (23, 9, 8, 3, 3, 1, 2) rotations required. A booklet of the solution, step by step, is provided. This puzzle was an entry of the...

Due to the unusual nature of this puzzle, I will ship it in its solved state. When I first purchased it, the seller tried to ship it in a locked state but it became unlocked during shipping; the same happened when I shipped it to someone else on a loan. For a spoiler, see: http://www.grand-illusions.com/toycollection/bee_box/

Description : Daedalus seems to be a classic interlocking 3x3x3 cube, but, on the internal hidden faces, pins inside grooves, can define it, like an internal evolutionary maze. When a piece moves, a part of the maze moves with. Each unit of the cube has edges cut which permit rotations. All the possible moves can be used. One unique solution, level : 49 (23, 9, 8, 3, 3, 1, 2) rotations required. A booklet of the solution, step by step, is provided. This puzzle was an entry of the...