Physical Danger
There's not much physical danger in being a daycare worker. Oh sure, a Tonka truck thrown at the back of your head hurts, but it probably won't do any real damage. Daycares are generally pretty secure, with auto-locking doors and fences around the outside areas to keep any danger away.
The main physical danger of being a daycare worker is getting sneezed on or coughed on and catching a cold or some other type of illness. Get those vitamins in because you're going to need them. You might want to buy your Kleenex in bulk, too.
Try not to think of the germs. Just think about what a great workout your immune system is getting. And you can stop making that face now—do you want it to freeze like that?