Secret crush help?

Ok ladies n gents, I'm helping out a friend here. She's totally got it for this guy but as of right now she's way too shy to just come out and confront him. He drives a utillity truck home every night and she's thinking about leaving him a little note and maybe also leaving something else on the step/door of his truck. Would a flower be too femme? Or can you think of something else she could leve him as an affectionate gesture? She doesn't want to leave panties or anything like that. Any help would be appreciated. Thanks!