Some would say it's cheaper to buy than go through all the effort...perhaps...but you sure wouldn't help the environment!
Here is a clock using recycled items and gifted to a friend.
Step 1: Things you need
1 clock movement from an old clock or bought
hard foam board ( i found this from an old election campaign sign) or anything hard but can be cut with a scissor
1ply plywood (had this around my moms house)
fabric or acrylic colors
wall filler ( optional)