Total drag, as it is nasty in little people. Plays out like a cold in adults w/ more mature immune systems, but in your toddler be prepared w/ the puffs, humidifier, pedialyte pops(for hydration), honey elixir to soothe the cough(since you cannot give them any cough syrup) and tylenol to reduce the fever they are guaranteed to get. Also, there is no medicine for it, so might as well save yourself the wait in the sick area at your pediatricians office, unless the breathing is really labored and your little one has a really bad case :(
Oh , and consider yourself in quarantine for a week...incubation is 2-7 days.
Better have a good rotation of videos you can tolerate watching w/ the little one in misery, as playing is almost out of the question.
Wah!