Any ideas pls for my 15 yr old gs and 13 yr old gd ?

[darlingish]

I have no idea what to buy my lovely godchildren and don't want to give them money or iTunes vouchers ?
I usually spend about £20 on each of them and try to think about it but its getting harder as they get older !
Any ideas welcome
Thanks x

My 13year old dd loves art stuff like colouring pencils with a nice notebook/diary etc.

What about something like this for gd?:

www.boots.com/en/Jack-Wills-Lip-and-Nail-Kit_1687924/

and depending what he is into, maybe something like one of these books for gs:

www.amazon.co.uk/1001-Video-Games-Must-Before/dp/1844037665/ref=sr_1_1?s=books&ie=UTF8&qid=1446328861&sr=1-1&keywords=1001+games+you+must+play+before+you+die

they do ones on movies etc too.

And you could pop in some of his favourite sweets with it.