You can use beads from a craft store like michaels or even just some kind of rope or twine. My husband had a friend that he worked with who had just moved here from mexico. My husband helped him do things like call the electric company etc., things that are easy for us but hard for a non english speaker. Anyway, one day he presented my husband with a rosary he had made by tying knots in a string and wrapping the string into a cross. This is how rosaries were origionally made anyway. They were just strings with knots to remind you how many times to say the different prayers.