I'm sorry to be a wet blanket, but a lot of these ideas sound like the type of things everyone always gets from older relatives, politely thank them for it then stick it in the back of a cupboard never to look at again. The make up and smelly stuff are always good stand- bys but not if the bathroom stuff is lily of the valley or something. Manga books are very popular just now with boys and girls, I know you don't want to go down the vouchers route, but itunes vouchers always go down well as they allow you to download individual tracks rather than buy a whole album - which tends to be what teenagers do these days. There's also a whole lot of things you could get the girls somewhere like claire's accessories - they do jewellery, hair accessories, scarves, hats etc - all pretty cheaply and more up to date than department stores or whatever. It also depends on individual interests - if they like a particular sport or past-time then something appropriate to it. e.g. if the boys like skateboarding, Argos do a great wee set of protective pads and wrist supports for under a tenner. Good luck!