IPP30 exchange puzzle by Hiroshi Yamamoto. Pack the 9 "acrobats" in the frame. Nicely packaged in a CD case. Not overly difficult, but fun.

IPP31 exchange puzzle by Pavel Curtis. A hard puzzle to classify as it is both put together and sequential discovery. The goal is to discover the "secret answer".I requested tips from Pavel to solve this, but I eventually got it. I wanted to make it available to others to have the fun of solving it!

Mental Nuts - Can You Crack Them?, printed 1897, 32 pages long. The Cover is hard to read, but also says, "with compliments of H.W.Patterson - Jewelry, Watches, Diamonds, Etc., Salem NJ". Even though the front and rear covers are very difficult to make out, the contents are in pretty good shape. Features 79 puzzles.

Oskar van Deventer is well known for designing some of the most interesting and creative puzzles available. His paperclips are no exception. With two possible solutions, the paperclips interlock to form a beautiful sculpture once solved. At 14 moves, finding the the solution to this work of art is no trivial task either. It is a very confusing and difficult puzzle to solve.Although beautiful, many of Oskar's designs are very difficult to realize in wood. That is why they are extremely scarce.Eac...

This sequential discovery puzzle was designed and crafted by Brian Young (IPP Design Competition 2012 Jury First Prize Winner) & used as Matthew Dawson's IPP 32 exchange puzzle. The puzzle has been played with only once and is in like new condition. Buyer to pay actual shipping charges.

this is one of Shiro Tajima's first puzzle boxes made for the karakuri group. It won a Jury prize in the IPP design competition in 2004. It has some unusual movements for a conventional looking puzzle box.I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

this was Shiro Tajima's christmas present in 2005. His description:Actually in this tiny box is loaded the enchanted power! Try! Let's turn the red dial in the front of the box. What happened? Probably it will be fantastic things. You might have a romance, might receive a message from somebody that lives far off in the Universe, or...?I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for pay...

this was Akio Kamei's Christmas present in 2010.I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

this was Akio Kamei's Christmas present in 2007.I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

Starts out like a typical box, then has an unusal rotation move. From the colaborative Creative Secret Box project of the Karakuri Club.I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

From the colaborative Creative Secret Box project of the Karakuri Club.unique 5-move mechanism. I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

this is Euraka's reproduction of Marcel Gillen's chess puzzle.the goal is to find the coin hidden inside.I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

18 piece interlocking burr designed by Brian Young.19 moves to get the first piece out, but there are alternate solutions if you ignore the colorsI'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

this was Andreas Roever's exchange puzzle at IPP32.like a few of his recent puzzles, it requires coordinated motion to disassemble.It is a 3 piece burr, and seems like rotations would be possible, but they don't seem to help.I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

this was Mike Chabala's exchange puzzle at IPP29.It is inspired by a design by Charles Perry...I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

this is one of Stewart Coffin's original 12-Piece Separation puzzle. one of his (and my) favorite designs. 10 identical pieces, one key piece, and one other piecethat is quite interesting to assemble and disassemble.I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

two pairs of puzzles assemble to make a nice dual-tetrahedral shape.I'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

not terribly difficult but nice geometric sculpture puzzleI'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

goal is to arrange the colored pegs in the grid such that each row and column only have oneof each colorI'm selling these puzzles to fund future puzzle-making equipment, and of course to buy morepuzzles :)buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

Nippon, the IPP 2001 puzzle from Wolfgang Schneider. You take a number of 4-cubie pieces and put them together so that you have a 6 sided figure showing the same number of squares in each view, and that each view is arranged identically. Sounds tough, especially when you add the "red dot" that will appear in each of the 6 views. I never did solve this one.