Cheap and environmentally friendly enough for even the hippies!
For this instructable I'll be using a bit of my own pink hemp (three cheers for extra hair dye!), though any type of string will work, even paracord. =)
Step 1: Materials
Hemp (or another type of string - floss works great but the result is much thinner)
Something to cut it with
How much? Well, as for beads, probably less than five if they're big enough. Maybe 10 if they're small. It doesn't take many.