Good, healthy, quick snack to eat between school and volleyball practice?

i need a yummy snack to eat between school and volleyball practice. i have school until 3pm then volleyball practice starts at 3:10 . i have to get out of the busy homeroom, go to the locker room, change into practice clothes, put my hair up, then get to the gym. But i get reallllly hungry and need something to eat that i can keep in my backpack or locker and snack on. Any ideas? I dont have a fridge or anything and im in 8th grade (if that helps). thank you!