My DS is 9 soon. Until now within his class, either all the boys, all the girls or the entire class were invited to parties. I think around this age it is usual for children to start inviting only some classmates and then other friends from sports/activities etc. My DS still wants to invite everyone so I will do that but am just wondering in general when the numbers tend to dwindle. Is it usual to invite everyone until they go to second level?