I got dd to make her own card (is moving to another room). I wrote inside something like - " To my ladies (what she calls them), I've had a lovely time with you all downstairs. Thank you. Love from dd. Then dd did some scribble writing too.
We did that too when moving a room. DD scribbled a 'picture' and I wrote "For all the lovely staff in <room>, thankyou for all the cuddles, "ba-ba" (her rendering of bye-bye) Love DD". Took in some jelly-babies and fruit pastilles too - chocolate not allowed due to nut allergy risk.