i am considering buying my 6 year old son a nintendo ds for christmas (and maybe my 4 year old son too so they don't fight over it). He has problems with social and communication skills (possibly aspergers, we are waiting for assessment) He would really like one, but i'm not too keen on him playing with it all the time. i like the idea of him playing more educational games like big brain academy or brain train, but i'm not sure that is what he has in mind! have parents noticed any worsening of their kids behaviour after buying them one, or am i being over anxious?! has anyone bought one with only educational games? will kids still play with it much?