I was gifted a second-hand Boppy* to help with my stupid elbows (cubital tunnel sucks, and I'm not supposed to rest my elbows on things... like arm rests... or the desk), but three of my four cats have decided that it's only for babies. And they are the babies.
It is saving my legs from kneading damage though!
Black cat: Jack, orange: Pippin, stripey: Kaz. Rowan not pictured, because he refuses to be a lap cat, even though he really wants to be a lap cat (just imagine a slightly bigger Kaz... I call them "the twins" for a reason)
*For those who don't have a reason to know this: a Boppy is a nursing pillow, and is typically used for babies to help them not get flat spots on the back of their head. They are really useful for other things, so if you have a friend or relative who is getting rid of one see if they'll give it to you. It's also been really useful while I play video games, because I'm slouchy and it keeps me from digging my elbows into my thighs and keeps my posture a tiny bit better... when I don't have a cat on the boppy that is.