It's clearly depends on how your son is treating his electronics devices.
An ebook reader would not be more fragile than a PSP, and I see a lot of children carrying them around and taking a decent care of them.
If you are afraid of harsh treatment, you should go with the EB1150 or if you want something smaller, an used PDA like the palm Tx or the HP hx4700 with a good case.
Not enough? If you suspect your son is gonna play soccer with it or throw it in the pool, there are some rugged PDA that would withstand even this kind of use.
Last edited by Faenad; 08-05-2009 at 04:25 PM.