Cute things i can leave in my boyfriend's room while he's gone?

My boyfriends going out of town for a week and im pet sitting for him which means i'll be in his house alot. what are some cute things i could do such as leaving things in his room for when he gets back? (for example,i already thought of putting a framed picture of us on his dresser,and spraying perfume on his bed/. cheezy i know :) but i know he'l love it) just want some more ideas!