If you fancy a bit of a gamble but safe in the knowledge your capital is protected, then you could put some money in premium bonds. The minimum investment in PB is �100. Whilst your money is safe in PB, you earn no interest on it so the value of your money is effectively eroded away if you keep your money there for many years - unless of course, you're a winner then you might get a good return (assuming you win a bit more than a tenner). I'd suggest an ISA is your best bet - all your interest is tax free and there is no minimum investment limit, only a maximum - �3,000 per tax year (but this drops to �1,000 from next April). You could put, say, �100 in PB and put �300 in an ISA.