Investment for a teen

[EGGceptionalbeEGGleeyes]

My son has been left a lump son (£3000.00) in my late sister's will. He's 15 and I want to put it into an acount for him for expenses when/if he goes to university.
I want to put it into a high interest account, maybe a building society, which he can access at 18 though I would like some control just in case he goes daft with it.
Any ideas?
Thanks.

For that amount of money I would be looking at something like a Junior ISA. Tax free and can only be cashed in by a child when they hit 18. They start in November and the maximum you can put in per year is £3000, coincidentally. In between then and now you could shop around for a good paying savings account held in your name on his behalf - but make sure they know that he is a non-tax-payer so that they don't deduct tax at source. A site like www.moneysupermarket.com should give you a good league table of savings accounts