2 year old brooding about being hit by other child at nursery

[time4tea]

my DS (2 and half) was hit and pushed by a younger and more boisterous child at nursery a few weeks ago and still mentions it a lot. the carers dealt with it by telling the child off and getting him to apologise, and it doesn't seem to be happening any more. But DS mentions it every day. I've tried reassuring him that the boy apologised and hasn't done it again, and that the other children play nicely (he has friends there that he mentions too) but he seems to be ruminating on it still in a worried way.
Any tips for reassuring him? or books on supporting a child with worries (both DH and I were fairly nervous children and had a lot of bullying to cope with, we'd love DS to take things more in his stride than we did...)

I'm sorry I don't have any actual advice, just wanted to bump this a bit, as my 2 yr ds is about to join pre-school and I am nervous of this. Am interested too.

Hi T4T. My son was also the same age (he's only just turned 3 now) when he kept getting pushed over at nursery. He's not at the nursery anymore (a number of reasons, but the main one being we're hoping to move) DS still talks about X pushing him over and hurting his knees.
I think what've said is pretty much what we said to DS. I did tell him if he ever pushed him again to say in a big loud voice "ow X you hurt me!" (as this child was good at doing it when nobody saw)
I guess if you reinforce the negative with a positive "X pushed me" - Yes, but that was a long time ago now, and he hasn't done it since."
I think it's just that age, where everything is really kicking in and they're grasping what's going on in their little world. My DS will point out every car on the road that looks like his grandads and grandmas cars, even his Uncles. The scary thing is, we haven't seen them since May and he's remembered three different makes and models. (ah bless, we see about 25 Grandads everytime we go out!! LOL!)
Sorry if I've gone on, I think your DS will be fine, unless he gets really upset about going to nursery because of this boy, I'd leave it to rest.
Good Luck!