I have three kitties 2 which are adults and a 9 months old. I change their litter 2 boxes!! (have to make sure that everyone is happy!!) I have to buy a 10lb bag of clay litter every 2 weeks about $7.00 (remember I have 3 kitties) and I am very particular that the litter stays clean. I buy a 10 lb bag of Iams food for all three each month$ 13.00. And of course treats. (They work VERY well to teach them tricks!!$1.00) My cats also love to play with the sparkley pom poms that you can buy in the craft section of any store (Walmart,K-mart ect.$2.99) And for other ideas about toys Milk Rings, an old fishing real with a toy mouse will keep a cat active also. That is the only way I keep my orange kitty from getting to fat. Hes a big eater. Depending on if your kitty is long hair or short haired you will have to get a brush. It helps keep the hair down for allergies. Also I have been thinking about putting insurance on all three of my cats since my 6 yr old himalayan one day started to have seizures and it cost 1,000 dollars down to just get a diagnoses. And a microchip is good for a indoor/outdoor cat also. The love that they give in return is so worth any amount of money I Promise