Five intersecting tetrahedra with an icosahedron inside them.  There is just enough space between all the pieces that it will print as 6 separ...

Three different solids of constant width 3cm. These are hollow and have internal stiffeners. Each is a solid of revolution from a different plane...

A fascinating 4-piece puzzle with 2 identical pieces and 2 identical mirror images which interlocks into a tetrahedron. This is the metal version ...

A fascinating 4-piece puzzle with 2 identical pieces and 2 identical mirror images which interlocks into a tetrahedron. This puzzle was invented a...

Three puzzle pieces made from (truncated) rhombic dodecahedrons assemble into a cube-like shape. Assembly is confusing and the three pieces mutual...

Stewart Coffin's Peanut Puzzle, modified by starting from 2.5cm (about 1 inch) diameter spheres. The six pieces are all different. This puzzle as...

This is a famous puzzle designed by Stewart Coffin 40 years ago. Wood copies must be made with great accuracy and have become sought-after collect...

Assemble ten identical pieces (plus a small icosahedron) into a 5 cm diameter ball. The geometry here is very confusing, but it is based on a diss...

Made from four iterations of the Koch snowflake fractal. A smaller size version of the original Koch Fractal Ornament.

Four pieces assemble into an octahedron using coordinate motion. Made from 19 rhombic dodecahedrons. The "child" is the locking piece - a small ...

A burr puzzle using 4 identical pieces. Not too difficult, but made harder by the small size of the pieces! It comes apart easily but is trickier...

Four pieces interlock into a truncated tetrahedron. Assembly is very confusing and requires rotational moves.

This puzzle consists of three identical pieces which rather surprisingly interlock into an octahedron. Each piece is made from 3D printed spheres ...

Made from four iterations of the Koch Fractal, a fractal pattern which looks like a snowflake.

This is my favorite pyramid design. Four puzzle pieces interlock into a 20-ball tetrahedron (or 3-sided pyramid). Assembly of this puzzle is very...

A puzzle designed by Viktor Genel, who has approved it's listing here. Tom Lensch made the important modification of using small cubes. An unusua...

Three different solids of constant width 3cm. These are hollow and have internal stiffeners. Each is a solid of revolution from a different plane c...

A 12 piece puzzle by Stewart Coffin. See http://www.puzzleworld.org/puzzleworld/puz/twelve_piece_separation.htm Comes undyed. This is a diffi...

Can three screw-shaped pieces plus another with tri-lateral symmetry be assembled into an octahedron? It doesn't seem likely, yet the assembly eve...

Two mirror image pieces assemble into a hollow polyhedron with curved faces. The final shape is the solid defined by the intersection of three cyl...

Stewart Coffin's Peanut Puzzle, modified by starting from 3cm diameter spheres. Includes six different pieces (the Coffin puzzle) plus two "en...

A tricky two-piece puzzle invented by Tom Jolly. Tom receives a share of the profits in the sales of this puzzle. Made from 1cm cubes, the comple...

Three pieces assemble into a symmetrical shape.  This was my exchange puzzle for IPP31.  Please contact me if you would like to purchase ...

A smaller version of Five Intersecting Tetrahedra without an icosahedron inside.  There is just enough space between the pieces that it will p...

Four puzzle pieces assemble into an interlocking octahedron. This puzzle is similar to my "Screwy Octahedron" except it uses three ident...

A version of the Koch fractal ornament designed for the frosted ultra detail material.

A tetrahedron puzzle to go with your Christmas Octahedron. This puzzle has two pieces which can be snapped together. You just need to find the co...

A box packing puzzle invented by Leonard Gordon more than 25 years ago. This is the original version of the puzzle, made from joined spheres. The e...

A box packing puzzle invented by Leonard Gordon more than 25 years ago. Originally devised from pieces made from joined spheres, here I use trunca...