Counting down the days until my daughters (cat) bday

The animal shelter I adopted her from set her bday to jan 1st as a default, but I made it a little more personal by setting it to jan 8th. Same day as my favorite singer of all times (Elvis Presley)

My girl will be 12 years old this year, and I can't decide how to make the day special for her.

I'd love to give her extra treats, but she can't have a lot bc of her chronical kidney failure.
She's not playful, so more toys are a waste of money.

I have catnip spray that I use on one pf her toys now and then



Any suggestions?