Still not sure about DS, go from thinking he is highly intelligent to thinking there is something not right with him (autism has been mentioned in past). He is very factual but lately has got really into toy cars and is very imaginative in his play with them.
anyway last week we were away for weekend and went into tk Maxx and i got him to sit in a trolley because he was tired, it was the trolleys where you have to put a quid in. then when we came out i let him put the chain in the next trolley and pop the pound out. Then he asks me... what happens when it gets to the last trolley?? Not ground breaking i know but it kind of staggered me that he'd even notice they all chain up..