How to save up money as a kid?

I'm 13 and and really beginning to get into photography. I have taken some pretty good photos on my iPhone 5 camera and my friend has a proper camera and I take some pretty good photos on that too. So I'm trying to save up for a proper camera because I can't carry on taking them on my iPhone. I already have £100 and need to save up to £350. Any advice to stop me from spending and a way to get more money.

Don't spend any money! Easier said than done but, don't buy things like toys or games. If you really have to buy the cheapest version or tell yourself how much you would like that brand new camera.

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