I am 36 and have always played Nintendo so I cannot comment on the psp, but I use my ds all the time! I take it on holiday, use it in bed etc. It has a wi-fi connection so if you have wireless broadband you can play people all over the world. The games are generally excellent (Touchmaster, 42 all star games & tetris are just a few wi-fi games). The battery lasts along time and the screen is backlit so you can play in the dark if you wish! All in all an excellent purchase.
Hope this helps!! Richy