Please post pics
Cat tree

(Not actually my cat tree but u get the idea)
Edit: i didnt generate this photo, its a link to an image that popped up. For the record, that would actually be a sick cat tree and I would buy it if it was available and I had the space for it which I do not)


The most consistent ones for me are cat trees, cardboard box scratching pad, an elastic ball that they both love to chase around (one of the two cats also fetches and brings it back like a dog), cat tunnels, and an elastic carrot thing with catnip in it that they love to attack
Also hiding some of the old toys they don’t care about and then bringing them back once they have kinda forgotten about their existence can spark up their excitement sometimes