I thought i'd add this website (i hope i'm allowed to? Mods feel free to take it off if not)

ASD Video Glossary: About

I wish i found this website earlier. It has a really good collection of videos of kids playing/interacting. You can observe 'nerotypical' kids doing an activity/play and then non neurotypical kids doing the same activity/play. It really helped me to see the subtle problems ds has with interaction and communication.

I hope it helps