Nice start to the holiday season...

Here's what we went through Tuesday through today at our house...

CHILD : Biologically, a child (plural: children) is generally a human between the stages of birth and puberty. Some vernacular definitions of a child include the fetus, as being an unborn child. The legal definition of "child" generally refers to a minor, otherwise known as a person younger than the age of majority. "Child" may also describe a relationship with a parent or, metaphorically, authority figure, or signify group membership in a clan, tribe, or religion; it can also signify being strongly affected by a specific time, place, or circumstance, as in "a child of nature" or "a child of the Sixties".
The term "child" is sometimes used as a generic term for sons and daughters of any age, with the clarification "adult child" where appropriate[3]. Such people are legally adults, not children, and this article does not apply to them.

PROJECTILE : A projectile is any object projected into space (empty or not) by the exertion of a force. Although a thrown baseball is technically a projectile too, the term more commonly refers to a weapon.

For details of the mathematics surrounding projectile trajectory, see equations of motion.

STOMACH FLU : Gastroenteritis (also known as gastric flu, stomach flu, and stomach virus, although unrelated to influenza) is marked by inflammation of the gastrointestinal tract involving both the stomach and small intestine resulting in acute diarrhea and vomiting. It can be transferred by contact with contaminated food and water. The inflammation is caused most often by an infection from certain viruses or less often by bacteria, their toxins (e.g. SEB), parasites, or an adverse reaction to something in the diet or medication.

At least 50% of cases of gastroenteritis resulting from foodborne illness are caused by norovirus.  Another 20% of cases, and the majority of severe cases in children, are due to rotavirus. Other significant viral agents include adenovirus and astrovirus.

Risk factors include consumption of improperly prepared foods or contaminated water and travel or residence in areas of poor sanitation. It is also common for river swimmers to become infected during times of rain as a result of contaminated runoff water.

So, we were ALL feeling it Tuesday through today. 
Nothing was safe.  Couches, blankets, cars... at one point Wee Man was at urgent care for fluids while Em was in between being sick and R2 started getting sick right in the patient room... I had to take her home and then I proceeded to get sick the next day while Em and Wee Man were still at the hospital under observation.  It was a mess.  Hopefully we will all recover in time to enjoy Christmas day, unlike last year.