Cat Enrichment Suggestions

hi! I have two almost senior cats - they are siblings but just tolerate each other. my husband and I took them in for a family-friend who could no longer due to sickness. (Tigger and Fluffly, male and female, have had for almost a year now!)

we had one cat before this and I grew up with cats. but I’m worried these two aren’t getting enough enrichment. I’m trying my best to play with them a few times for a bit when I get home from work, and sit outside with them in our backyard.

id love a catio, and a better cat tree - if recommending, keep in mind both of these sweet kits are bigger boned.

they both love string and these fuzzy cheap balls from Petco (which keep getting lost). they do not like toys that run by themselves, or at least the ones that have thick string/wire thing with something on the end that flings around. they DO like when *I* do it, haha

because they’re bigger cats, I’m anxious on buying tunnels but I do think they’d like them, at least Tigger would.

i’m just looking for some suggestions on things that have worked for you!