They Like It
Instructions
If you do not have a laser cutter, you can also make the toy with plain scissors. Print out on card stock for best results. After you cut out the outline, fold along all the dashed lines, keeping the graphics on the outside. Start assembling by matching up the two edges labeled ^ 1 ^ and taping them together. Continue in sequence with the two edges labeled ^ 2 ^, etc. through ^ 6 ^. You will get a tube like shape with six tetrahedrons attached in alternating positions. Join the first to the last one, to get a closed donut, and tape together the matching edges labeled ^ 7 ^. The linkage is almost ready. Flip the linkage through and tape the two edges labeled ^ 8 ^ together on the other side. The toy is now ready to keep fingers busy!
If cut by laser, the folding is a lot easier. The more accurately you make it, the better it moves.
The .cdr file (Corel Draw format) can print to an Epilog Zing Laser. If you do not have Corel Draw, you can print the .pdf file.