P.M.
There have always been a child or two who overload on stimulation or sugar at a party and break down. But more than ever, I see not only kids not always enjoying parties, but often the adults connected to those kids experience unhappiness around the whole affair, even as they struggle to maintain big smiles.
When I was little, way back in prehistory, bd parties were simple affairs. Candles, presents, cake and ice cream, a few predictable games and prizes. Simplicity is a thing of the past, and when things seem to go wrong, it's often some combination of the following:
Parents often appear to feel they have to keep up with other people's party and gift expectations, plan elaborate and impressive bashes, give gift bags to all attendees. Having fun is almost beside the point; they don't really plan for fun so much as making the right impressions. There's a great deal of expense and anxiety involved in all that, and I think kids feel not only their parents' strain, but may build up unrealistic expectations about what sort of gifts they should receive. Events are often too long, involve too much driving to some pricey (and often noisy) destination, and end up feeling frantic in multiple ways. And gift givers are also anxious; will their presents compare well to everyone else's? And how many more expensive gifts will the parents still have to fit into the budget before the next round of birthdays starts?
Modern birthday parties simply astonish me. They sometimes seem more an exercise in masochism than celebration.