Yes, definitely what Sherry said. The first thing to do when they start suddenly peeing inappropriately is take them to the vet. That way, even if there is nothing wrong found, you can at least narrow down the problem to behavioral. UTIs can be serious in cats though, so always bring them to the vet if they begin to pee in new places. In UTI cases, they will start associating litter boxes with pain, and will then avoid the litter box completely which can be a reason behind litter box issues.
My bengal Hemlock (she is still fairly new to me too!) likes interactive puzzle treat toys a lot. Petco doesn't carry and good ones, but my local pet store carries two. I've also had my eye on an interactive toy there that is flat shaped like one of those circular tube ball toys for cats to bat at, but instead of a ball, it is battery powered and has 4 holes on each side, and a feather toy will randomly stick out of a hole. It's like cat wack-a-mole. It's similar to this:
https://www.amazon.com/Quality-Interact ... er+cat+toy And here are some puzzle treat toys that keep Hemlock entertained and busy:
https://www.amazon.com/PetSafe-Egg-Cers ... zle+feederhttps://www.amazon.com/PetSafe-SlimCat- ... puzzle+toyShe also likes Catit interactive toys. Her favorite so far is the digging one.
https://www.amazon.com/Catit-Senses-2-0 ... ords=catitI know Catit also has another food activity toy that I'm planning to get next:
https://www.amazon.com/Catit-Design-Sen ... puzzle+toyShe also uses a cat wheel and that helps with her energy too. They are a little pricey, but she loves hers a lot. The brand of the wheel is called "One Fast Cat."
https://www.amazon.com/One-Fast-Cat-Exe ... e+fast+catI also just found this, which I think my girl will like as she likes to dive into plastic bags and play under the covers:
https://www.amazon.com/Ripple-Rug-Activ ... =cat+wheelSorry for the link heavy post, but these are definitely all things that keep Hemlock entertained! I hope some of these help!
Edit: Found the one feather interactive toy I was talking about!
https://www.amazon.com/OurPets-Electron ... er+cat+toy