Well, at first it might look terribly difficult but don´t worry, the difficult part is starting and ending, in my opinion. It takes quite a lof of time (it you´ll have short breaks while doing this, and I hope you will!) but the result is wuite wonderful.
It can be a classic piece of jewellery using darker colors and very funny and modern using different beads and shiny colors.
And also a good christmas gift, I hope my boyfriend´s mother will like it!