Change of plans - sick baby boy

I was up most of the night last night with our little guy. He has been running a little bit of a fever and I just thought it was teething. Last night I was up with him and he threw up on both of us. Not a pleasant experience at all. Today he just feels crummy. He's slept off and on and just wants to be held and cuddled. My mom took him for a little bit so that I could get a few things done. So.... this kind of throws a wrench in our 4th of July plans. Not sure what we'll be doing... it will depend on how the little guy is doing because we definitely don't want to "share" his illness with his cousins.