Here's a selection of 4 of my favorite versions of the Haeckel Sphere puzzle. Each variation has a cute name and a pleasing color scheme that helps keep the pieces from getting mixed up with each other.

This set expands upon Haeckel Sphere Set #1 with two more of my 5-color designs, plus Stewart Coffin's classic 6-color version and his new 10-color version.

This set includes all of the white colored insert pieces required to make the following puzzles:

• CrossCode Burr #1
• CrossCode Burr #2
• CrossCode Burr #3
• CrossCode Burr #4

This kit comes with one set of body pieces preinstalled with the CrossCode Burr #1 inserts, and preassembled so that you get a chance to do one as a disassembly puzzle rather than an assembly puzzle.

Whereas the GreenCode Burr Master Set gives you 4 variations while keeping 75% of the green pieces the same (small bag of extra parts) the members of this CrossCode family don't share any noteworty pieces beyond the most basic double-pin ones, thus this Master Set comes with larger bags of extra parts.

If you want to spend more: I sell "display upgrade kits" of white insert pieces that contain the 5 ones which are the same between each variation, so that you can have multiple variations assembled simultaneously. You'll need to have an extra sets of body pieces too.

If you want to spend less: I sell this set of white insert pieces as a standalone upgrade kit that does not include any body pieces in case you already have enough of those and don't mind recycling components from one to the next as you try each member of the Barcode Burr family.

If you want to maxx-out your display shelf: This master set + 3 display upgrade kits + 3 sets of body pieces will let you have all four CrossCode Burr variations assembled at once. Honestly though, if you want to go this route then you might as well just buy all four of the individual preassembled from me so that you get to experience them all as blind disassembly challenges as your first experience of them!

This set includes all of the green colored insert pieces required to make the following puzzles:

• GreenCode Burr #1
• GreenCode Burr #2
• GreenCode Burr #3
• GreenCode Burr #4

This kit comes with one set of body pieces preinstalled with the GreenCode Burr #1 inserts, and preassembled so that you get a chance to do one as a disassembly puzzle rather than an assembly puzzle.

On of the interesting things about this family of "GreenCode" designs is that they all share 75% of the same insert pieces, so the only difference between them is which version of maze path "tab" inserts gets installed on pieces #1-3. Another interesting thing is that for each of the four design variations, all three maze path tab inserts are identical. The nature of how these design variations share so many of the same pieces allows this master set to only need 9 extra insert pieces beyond what comes preassembled in order to get 3 more puzzle challenges.

If you want to spend more: I sell "display upgrade kits" of green insert pieces that contain the 9 ones which are the same between each variation, so that you can have multiple variations assembled simultaneously. You'll need to have an extra sets of body pieces too.

If you want to spend less: I sell this set of green insert pieces as a standalone upgrade kit that does not include any body pieces in case you already have enough of those and don't mind recycling components from one to the next as you try each member of the Barcode Burr family.

If you want to maxx-out your display shelf: This master set + 3 display upgrade kits + 3 sets of body pieces will let you have all four GreenCode Burr variations assembled at once. Honestly though, if you want to go this route then you might as well just buy all four of the individual preassembled from me so that you get to experience them all as blind disassembly challenges as your first experience of them!

Here's a fun set of all three stellations of the rhombic dodecahedron, inspired by previous wooden editions I've made such as the IPP29 stellation sets but instead of using Stewart Coffin's original designs for Permuted Second Stellation and Permuted Third Stellation puzzles, I've slightly modified the piece geometry in order to allow them all to 3D print easily. My version of the third stellation is very similar to Coffin's however my second stellation is medium difficulty compared to Coffin's version. A benefit to making the middle puzzle is that it provides a nice ramp-up of difficulty going from smallest to largest puzzle.

I like to deliver these puzzles to customers in the "scrambled" state where one puzzle is solid black, one is solid white, and one is solid accent color. As such, the first three puzzles to solve are those of figuring out how to get these funky looking structures disassembled (not easy). The fourth puzzle (easy) is to sort all 18 pieces to figure out which ones are supposed to go together. From that point, the next three puzzles to solve are getting each stellation assembled correctly.

7 puzzle challenges!