I teach a class on Bicycle Repair to 7th and 8th graders. It seems I always catch one of them trying to permantently attach a chunk of bike chain to their wrist as a bracelet. Two problems with this: the chains are always FILTHY and no amounts of degreasing, scrubbing, cleaning, or soaking would keep them from turning your wrist black after a few hours of wearing it. The other problem was they were trying to put them on using the chain breaker, which is pretty permanent, and in my opinion just a little unsafe...
My solution uses an easy to remove "clasp" to take it off or put it on, and by starting with a new chain, no more black wrists!
Step 1: Gather your Junk.
Tools & Supplies:
Chain Breaker (or a grinder will work if you are careful)
Glue. I recommend JB weld, the gorilla glue didn't work on all of the magnets.
NEW bicycle chain (about $15.00)
Neodymium Disc Magnets 1/4" X 1/16" (I bought a pack of 100 for abt $12.00 shipped)
Small bolts or rivets
Thats it! I figure you can make 4 bracelets easily with one chain and one order of magnets, so each bracelet would run about $7.00. Less, if you use less magnets and can get more than 4 out of a single chain.