If you need to know where your cats are at a given moment, just shake the bag. They will come from near and far...one of mine has learned to open the cupboard door to get at them.
I gave a friend a bag of catnip once. She put it on top of her refrigerator. The next morning she came into her kitchen and the contents of the bag were all over the kitchen.
It was her first cat. She didn’t know much about them. Obviously.