Lol, yep mine loves foil also! Along with any type of Rubber Bands! She will find a way to climb shelves anything if she knows there may be rubber bands hidden somewhere to include knocking anything and everything out of her way to find it. I swear she smells them instantly. She also can be a little thief. Long time I couldnt figure out where all my pens were disappearing to until I cleaned out the back of my bedroom closet and found her stash along with toy mice, jewelry and other trinkets she managed to hide.