I'm 16 and I'd like to invest, but i need some help?

[T]

Hi guys, I'm 16 and have just had my first summer job, so far I have gained £1200. I have spent £600 and still have £600 left. I have had a good time with the money, so now I would like to save/invest and take a risk. I don't really have a clue what I'm doing but I do have a few aims. I would like it to be a short term commitment, ideally so that I can pay for university fees or help for a deposit for a mortage. I also wouldn't mind getting a macbook in the near future. I would like to be able to access with ease. I do not mind taking a financial risk as if I was to lose the money it would not be the end of the world and I feel it would be a great life experience. I have £600 to play with, I need some ideas. Thanks in advance, T