Anything Bratz.... Or for the more mature 10yr old, Playboy (personally, i find it a little too old for them, but by, they grow up quick)
Nintendo DS games/WII/PS/XBox games (check with parents to see what game station & games they have) anything to do with Sims 3+ is usually dead interesting for them & keeps em out of trouble for hours!!
Make up (but the more grown up stuff)
Hair braiders/straighteners/crimpers - particularly anything by "Mary,Kate & Ashley"
Woolies/Boots/Asda all good places to get any of the above
I've only gone by what my 10yo girl likes, but hope it helps