Make a dodecahedral – 12 sided calendar
Fun calendar project “A dodecahedron is literally a polyhedron with 12 faces, but usually a regular dodecahedron is meant: a Platonic solid composed of twelve pentagonal faces, with three meeting at each vertex. It has twenty vertices and thirty edges. Its dual polyhedron is the icosahedron. Download a dodecahedral calendar after your own specifiation. Choose PDF format if you can’t print PostScript files. Choose PostScript format if you want to modify the calendar. The PostScript file explains how to mark holidays and birthdays.” Thanks Star! Link.
Cool idea, this little device samples and stores the color of something you like – “RGBy, by Shinya Matsuyama and Makoto Hirahara, is a cube-shaped lamp that senses color and glows with the sensed color. For example, when you find a nice color at a flower garden or a designer clothes store, you can use RGBy to capture the color to appreciate it.” 
Southpaw writes “After reading the 
Here are some handy tips on making an already useful Moleskin notebook even more useful – my favorite “Pencil sharpener. Two pieces of sandpaper, couse for wood, fine to sharpen the lead to a nice point. Sticky back tape the sandpaper to the back of your notebook.” 
This site has a bit of information about a paper microscope kit, they’re only sold in Germany, but it looks easy enough to recreate these and make your own…“Here’s a microscope, made from nothing but paper, two lenses, a plastic mirror and a drinking straw. Although this is not the kind of material you would expect to be used in an optical instrument, the facts are quite amazing: 50 x magnification, gear drive for focus setting, high quality plastic lenses, mirror to collect light for transmission view.” Thanks Joevennix! 
DoctaBu” writes “Using some base code from 
I might make one of these myself with other bits of retro gear, it’s really clever. “These calendars showcase different classic computers on each page. It includes the Vic 20, Apple IIGS, CPC 464, TRS-80, Amiga, Atari 800XL, etc. It’s a perfect gift for any computer enthusiast or anyone who remembers those classic computers of the past.” Thanks Scotty!