I'm a mother of 3 teenagers. I'm also on a limited, single income and, of course, never have enough to keep them happy in the electronics department!
My oldest has her own job and was able to afford an IPod Nano. She loves it and is really quite generous in sharing it with her brother and sister who foam at the mouth with desire every time she uses it.
My answer to actually being able to afford an IPod Nano, that normally runs about $240 retail?
The above number connects you to the Apple Service Center, which offers refurbished IPods for a fraction of the cost. An Ipod Nano runs for about $99 and comes in a variety of colors.
Of course it's a hit or miss situation and definitely first come first serve basis. But for anyone who cannot afford to purchase one for every kid (big or small) in the house... this is truly your answer!