when people say foamies, they mean the craft foam you get at hobby lobby, walmart or just about anywhere.
http://www.google.com/search?hl=en&safe=off&client=safari&rls=en&q=foamies+craft+foam&gs_sm=e&gs_upl=10334l12032l1l12699l11l10l0l0l0l1l449l3337l0.1.4.1.4l10l0&bav=on.2,or.r_gc.r_pw.r_cp.,cf.osb&biw=1359&bih=780&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=fi