Is it normal for a reception aged child to often play on their own? DS says he does play with others and lists names but often says he on his own - which he says he doesn't mind but makes me feel sad!
Would any of these other things worry you;
Finds change really hard
Scared of anything unknown e.g. Films/books so we have to watch same films not new ones
Very texture sensitive with food
'Shy' and slow to interact around his peers
Can have massive tantrums that he finds really hard to recover from (but generally only when tired and only at home)