Working age is 14..........
I'm lucky though I can in work in my parents business. Because of that I have a Macbook air (13.3",1.86Ghz processor, 4GB Ram), Alienware m15x (15", i7 2.8Ghz turbo mode processor, 4GB Ram), iPod touch 32GB 3rd Gen, iPhone 4 16GB Verizon, Xbox 360S 250GB, 2X 1 TB external drives, and a 20" external monitor w/ Joystick 4 flight simulator. So yeah I mean I've been working for them for like 3 summers now and I still have around $7,500 (which I am going to use to buy the new mac pro when it comes out). So work hard and you can get what you want.
BTW I'm 13 years old.