gift ideas for 14 year old boy

[yeeyeelovesraaraa]

I dont have one of my own of this age & am clueless as to what sort of stuff they like. Budget £15-20. Any suggestions much appreciated thanks

Waterproof Bluetooth speaker for the shower?

Earphones
Calvin Klein underwear
iTunes vouchers
Book voucher

Hmv voucher? JD sports voucher, latest dvd boxset?
I have a nearly 14 yr old and it's a difficult age . He's asked for mainly smelly stuff and a hifi . He hasn't really asked for much this year unlike previous years .

I'm getting mine a headset for his PS4 and a PS4 game. He couldn't think of anything else, but vouchers are a good idea.