If you and your husband are going to take turns taking your son on the rides, make sure you compare notes when you hand the child off to the other spouse.
For example, when Mom comes to relieve Dad, she should make sure she asks, "So, how many times has he ridden the swings since I've been gone?"
Why? Well, because a corndog and three consecutive rides on the swings equals one sick boy.....
This is a look I will have to be watchful for NEXT year at the fair. Maybe then my son won't be the kid puking up a corndog on the carny running the ride.