This is a 5x5x5 cube with a hole through the middle. Made by Steve Strickland.More details from the designer - Watson's wormhole

A three piece burr that has 2 mazes inside it. This puzzle is not numbered as it was one of the designers copies.See Minotaur's Burr for the original listing on Mr Puzzles Site.

Yeah, everyone needs a few of these in their collection. Philosopher's Knot; not sure about the manufacturer, might be Futuristix. About 20-30 years old. No box, no instructions, take it apart and put it back together.

My IPP32 exchange puzzle. Pack the 13 L-shaped pieces into the frames on either side. The pieces can also be packed into a 4x4x4 cube and other 3D shapes. Puzzle includes an 8 page booklet of challenges. Comes in a clear plastic box, you can store the puzzle in the solved or unsolved state.The pieces are 9mm thick, this puzzle is fairly heavy for an acrylic puzzle, as I recall 100 of these puzzles weighed 33 pounds or 15 kilos.

This was Wei-Hwa Huang's IPP28 exchange puzzle. The aim is to match up five pairs among the ten pieces (two are shown in the photo) so all the pieces can nest in the cylindrical container. The problem can be interpreted in terms of a connectivity graph.Top has on it "(c) Wei-Hwa & Oskar", the latter referring to Oskar van Deventer.

An IPP31 Exchange puzzle from A. Kalinin.It is easy to pack the 4 duckings in the top lake. Not so easy in the bottom lake!I wanted to give others the opportunity to try this fun puzzle.

Fit the extra triangle into the seemingly full tray.

Designed by Marcus Gotz and fashioned beautifully by Eric Fuller from woods which include walnut, sapele, yellowheart, wenge, maple, bloodwood, padauk, rosewood, holly and purpleheart with a cherry stand, this is a sliding tile puzzle with an extra dimension.

From an unknown craftsman this is a 6 piece burr in solid oak.It's made from rods 1 cm square and some 8 centimetres long.Not the hardest 6 piece burr but a nice puzzle.Ships worldwide from The Netherlands.Buyer pays shipping and fees.

Including directions this is a Pyrix puzzle!Send to you in a clear box, since the original box is gone.for more info have a look here: http://www.jaapsch.net/puzzles/pyrix.htmShips worldwide from The Netherlands.Buyer pays shipping and fees.

From Belgium these are two boxes with the red and green geometrics.The series consists of, I believe, 6 versions in total.Each box contains five tangram like puzzles to be put together.Ships worldwide from The Netherlands.Buyer pays shipping and fees.

This is the late Tom Rodgers' IPP31 (Berlin, 2011) exchange gift. "Assemble the six pieces such that each piece interlocks with another one. This puzzle has 8 symmetrical solutions, but only one that fits easily inside the jar. Find this assembly." Comes with the jar and a label which, incorrectly, claims it's from IPP "31". This is Stewart Coffin's design #247. One piece signed "247 STC 2010"

A-MAIZ-ING - fit a bunch of sections of a corn cob in a glass. Puzzle comes unsolved. Toyo Glass, designer Nob Yoshigahara. In original box. Weighs 15 ounces with shipping box.

Made by Eric in 2008 and in his own words : Ronald is one of my favorite designers out there. He has a talent for puzzles which are not only challenging, but also very aesthetically pleasing. Kim NoPack is no exception. Using a simple set consisting of ten pieces he has devised a puzzle which is tricky and interesting to solve. While the pieces are symmetrical (two pairs of mirrored sets plus an outlier), the solution is decidedly non-symmetrical. There are several interlock...

This puzzle was exchanged by Bernhard Schweitzer at IPP 22 in Antwerp. It is one of a number of duplicates I am selling.The goal is to pack the four pieces in the box and close the lid. The puzzle was designed by Liu Suzuki (Tokyo) with the box being made by Joseph Pelikan and the pieces by Bernhard. The puzzle comes with the original packaging.This item will ship from the United Kingdom and I will add actual postage cost (by Royal Mail) to the winning bid. If you are an attendee of the L...

What Eric has said:"Markus designed this puzzle quite a while ago and I always liked the looks of it. Finally I emailed him asking if the design was free...and it was! One hitch though - there was more than one solution. I greatly prefer puzzles with a single solution, so I decided to enlist Tom Jolly to see if it could be modified into a single solution. Tom quickly determined that the original had at least 15 solutions. Both Tom and Markus subsequently went to work, both coming u...

Yin and Yang, metal puzzle from Bits & Pieces, #07-6432. Desiged by Doug Engel. Metal. Comes with solution sheet and original box. Weighs 11oz with shipping box.

Pack Six - designed by Eric Fuller, and made by him. Six pieces packed into a nice box. Six exotic woods; shows nicely. About a 30 minute puzzle, maybe less. 16 ounces with shipping box.

This is a special, short run puzzle named Twin Box Pentominoes designed by Primitivo Ramos and crafted by Brian Menold. The puzzle measures 3.5 x 3.5 inches. Buyer to pay actual shipping costs worldwide.

"Stuffing", 5 pieces in a box (4 double-cubes and 1 singleton). Packing puzzle, designed by Liu Suzuki, Bernhard Schweitzer's exchange for IPP2003. Puzzle weight with shipping box is 8 ounces.