Children are literally the definition of messy, so when an unexpected odor arises from day care centers, no one is really surprised. Children make messes, spill everything and never fail to put something somewhere silly, so it's only naturally that weird odors come out of kindergardens like no tomorrow. However, these odors could turn into something completely different. If a child sticks a piece of their sandwich behind a dresser and it molds before it can be found, that could create a serious problem. Mold spores will go up into the air and has the potential to make everyone that comes in contact with that room for a long period of time very sick, depending on the type of mold.