A basic clock is pretty easy to make: you just need a clock kit, which has the workings and the hands, and something to be a clock face. Clock kits usually cost less than US$10 in craft stores. Clock faces can be almost anything (flat-ish) you imagine, from a porcelain plate with a hole carefully drilled through the middle, to an old vinyl record, to your friend's wedding photo, to an actual, formal clock face.
IKEAhacker posted a great clock hack of this nature from the November Dreams blog, which involves only making a few holes: a space for the clock parts, and holes for the hands. If you don't happen to have an IKEA near you, no problem. You won't be able to duplicate the project exactly, but you'll be able to find very similar items at almost any craft store.
Be sure to check out the IKEAhacker post for links to four other fun, easy clock projects!
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