What to get a 14 yr old boy?!?

E • Animal lover, artist, & wannabe chef. 18/CA 🦋💗🐺✨♏️
Hey ladies,
My little brother is graduating eighth grade and leaving for boarding school soon. I'd love to get him a gift, but I have NO clue what! Any ideas?!
He's very outdoorsy and enjoys all that stuff but really has everything he needs for those kinds of activities. I was thinking of maybe a hydroflask, but he has water bottles. 
Help!!!!