Kids and mobile phones !!?

Hi...my daughter is coming up to her 6th birthday at the end of this month...she wants a nintendo ds and a mobile phone for her birthday...ehich i havent got a problem with money wise...buttttt....am i doing the right thing letting her hasve a moby at such a young age...i mean she is grown up...and she only wants it for the music , pics and to txt me and her dad....what du think....help ....xthanx for all the comments half of it i dont understand because i live in worcester england....the phone from that net site looks cool but would help if i knew how much it would be in english pounds ...xx
Answer
I think it is wrong for a kid to have a phone. who do they really need to call? somehow we all made it through childhood with out the music, pic and txt all the time.....