K.C.
My kids both had it a few weeks ago. They presented totally differently:
Baby (7 months at the time) - it started on her chest as tiny red bumps. Next day, she had small bumps across her belly right where the diaper hit it. Third day, huge bumps/rash along her bottom where the edges of the diaper hit, along with bumps on her upper arms and torso. Oddly enough, only two dots on her feet and none on her hands and mouth. She did have a low grade fever and was extra fussy the first couple of days.
Son (age 4) - low grade fever, sore throat for a day or two, then bumps all over his hands and feet. Never in the mouth. Still had ALL his energy... it was awful because we had to stay home and he was bouncing off the walls b/c he didn't feel sick!
It's highly contagious, so stay home for the next 5-7 days, longer if it is still progressing at that point.