Saw \link{http://www.fabletrading.co.uk/index.html\Trollbeads} in a jeweller's shop the other day, and loved them. Great idea - buy a chain for either bracelet or necklace, choose a clasp, then choose beads to put on, and add whenever you can afford to (or can persuade someone else to buy them
). Loads of different beads, and the name's fab too
.