So my 4 yr old is invited to a 5 yr olds party. We've been to many similar events but always at village halls or play centres where I obviously stayed with my child. This one is at the child's home, the house is quite small and the parents (who I don't know very well) haven't indicated if I should stay or leave child there for the 2 hours. I'm not sure what the usual process is once kids are at school?