Disclaimer: I am not trained in the medical field, nor am I a parent. I have been a child, have eight nieces and nephews and babysat a lot.
* Young children’s digestive systems are still developing.
* No one knows what food allergies the child might have until they display signs and are tested.
* A young child might be experiencing any number of medical problems, including ear, bladder, intestinal infections, and the parents are none the wiser until symptoms show up.
* It could be a reaction to medication.
* Some are prone to car (motion) sickness.
* Young children are prone to put things in their mouths that they shouldn’t. They also tend to eat with their hands. They also drop food, pick it up and eat it.