Where can i find directions for making a bell out of old christmas cards?

my mom died in june and i have all the old christmas cards she had sent me over the years. i heard there was a way to make a bell out of old cards, does anyone know how to do this? or i would be interested in making anything else with them except place mats or putting into frames to hang on wall as my wall space is limited. any and all help will be lovingly appreciated. thanking you in advance. fran