Cats not using the litter pan could be a sign of illness. If your cat is not using his or her litter pan, you should contact your veterinarian for an exam. This can rule out any Urinary Tract Infection or Kidney Disease.
Sometimes cats can be too curious for their own good. Be watchful as to what Kitty is curious about.
Yarn, string, rubber bands, and shoelaces can cause serious harm if ingested. Smaller items such as buttons and paper clips can be a choking hazard.
Cats are also attracted to bags. Plastic bags can cause problems. If ingested they could be at a risk for strangulation. Please be very cautious as to what your kitty is interested in.