For the litter box buy a big rubbermaid or equivalent box with a lid on a hinge and then cut an access door in one side. Make sure you cut the door high enough so the litter will stay in. It's a great litter box because it's big enough to contain everything.
Nail clipping. Our vet recommended using a pair of large human clippers instead of the pet specific ones. The pet ones cut from the top and usually crush the nail first. Use the human clippers from the side of the nail. I find it also helps you see the nail and the quick in the nail so you don't go too deep. Having a scratching post or two helps and cats seem to love these corrugated cardboard scratching pads.
Laser pointers are fun for cats if used with caution. Even low level ones can affect eyes so use only on rugs or carpet. On a hard surface like vinyl or hardwood the light will bounce and it could be harmful. It might also be a thing you want to keep away from kids as they could blind each other with them.
We have these balls with a jingle in them the cat goes nuts for. They look like a ping pong ball sized whiffle ball. Cat loves it as she can grab it with her teeth and carry it around. I believe they are called Midnight Crazies or something like that, comes in a pack of 8. Best toy we've ever gotten the cat by far.
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