What kind of things should i put in a care package?

It's my boyfriends little sister. she's a year younger than us, she's a freshman and i can see her already making mistakes that i made my freshman year. her friends are typical girls, they like to look cute and impress boys and what not, but i can see them misguiding her. she's a smart girl she really is but she's got herself liking this guy who is 19. its a new thing and everyone thinks she can handle herself and knows where to draw the line, but they said that about me too and i made terrible mistakes with boys. ones that i can't even believ i did. madison and i hardley get to talk because i hardley get to see my boyfriend because of school sports and work, but even though we aren't that close, i am not okay with this thing she has with the 19 year old. i talk to morgan (my bf) about it, well i try, he doesnt like to talk about it i guess. but i was thinking about sending her a cute little care package for her because i think she gets lost in all the chaos of highschool that she doesnt know who she is exactly. so i was thinking about decorating a diary and giving it to her writing her a letter and putting all of that in the package, but what else should i put in it?? thanks in advance