Good snacks to mix with nuts?

I'm an athlete(a girl) and eat very healthy. i'm 5'2 and around 104 pounds.. I eat around 6 meals a day 3 main and 2 snacks but i'm starting to add nuts to my diet.. I have almonds walnuts and cashews! For my in between snacks i eat mixed nuts..But is there anything eles i can eat with them? (i'm currently trying to gain muscle so i have to eat more then just a couple nuts) I know there high in calories so i eat them in moderdation :)