It's possible that at that age, your cat can't help it. If it used to use the box regularly, it may have lost control of its bladder function. I would definitely consult a veterinarian.
litter box training mite work
If your litter box is clean, he might have a kidney or bladder infection. You should phone the Vet and ask whether he needs to see your cat. I've heard that peeing everywhere is a symptom.
Put rectangular pieces of cardboard on the sides of the box and then change then everyweek.
If your cat pees on the carpet instead of its literbox it is peeing for. Territory you need to get ur cat nuttered
A sand box is a natural place for a cat to pee. When I lived in SanDiego not far from the beach I used sand my cat's litter box. Clean, scoopable, clay cat litter is the only alternative to your cat peeing in your kids sandbox.
Try closing your door to your room and then the cats will not go in your room and then the cats will go in the litter box and if not then probobly the litter boxes are not clean.
Put the kitten in the litter box or on some old newspapers before it can urinate, or as shortly as possible afterward. With patience and repitition, the kitten will learn where it is supposed to go.
YOu need to clean around the litter box with sent distrying cleaner
Try training it. If this doesn't work, talk to your vet.
First, have your veterinarian screen your cat for any medical conditions. These can lead to your cat urinating in inappropriate places. Next, if you use a litter box, place it near the couch. You want to make it as easy as possible for the cat to choose the litter box. You can spray the couch with something lemon scented to discourage the cat from using it. If you think your cat is peeing on the couch because he or she is stressed by something outside the house, block access to these images (e.g. a dog in the yard.) Finally, if none of these things work, confine your cat to a clean area with a litter box, food, and water, until they have learned to use the litter box.
Clean it thoroughly and perhaps put a piece of furniture over that site for awhile. Another possiblity might be to put the litter box closer to that offending site.
you have to train your cat that its not a good thing to pee on the floor, 1.scold and punish it when it pees on the floor 2.reward and praise it when it uses the litter box this tells your cat that using the litter box is a good thing and peeing on the floor is a bad thing.