Make a pen holder from an empty soda can. Its easy to make, cheap and can hold a yearly calendar as well. My first entry. Also, I don't have a digital camera so I took the pictures from a mobile cam. Hope they're good enough.
Empty soda can
Some playdoh (or any suitable replacement)
Step 1: Cutting up the can
Take an empty soda can. Rinse it out with water so that it removes any traces of soda left in it. Cut off the top off the can using a utility knife. Cut at a plane a little above the upper rim (i.e. the point where the cylinder starts). Also please be careful not to cut yourself while doing this. The easiest way to do it is to push the knife vertically in the top so as to make a hole. Then using the point where the knife meets the can as a lever, twist the knife so that it keeps on cutting more. Kind of how a can opener works.
As you can see in the picture, I had already started cutting the top of the can.
Now you have an empty can and its top. Dispose of the can top.