Seriously has to come down to the ease of organizing a birthday party for kids. Parents are busy with everything else they have to get done, and when they know they can easily book a party & everything is done – rather than having to book a number of services, organise a menu, buy & cook the food, plan and host the kids party games, control lot of little kids and keep them all happy, take the photos & video moments, then clean up afterwards –sounds exhausting just writing it. Ohhhh don’t forget to pray about the weather.