My 4.5 year old has been invited to a birthday party at a soft play centre, I need to clarify the child's age (they're at nursery so could be 3 or 4) if 3 I presume this would be parents staying? If it's a 4 year olds party would I be expected to drop him off and leave? I will probably just text the mum, but just wanted to get a feel for what the etiquette is, we've always managed to avoid parties so far lol!