S.L.
We have a daycare child that is allergic to peanuts. She brings an epy pen to daycare just in case. We haven't had any real problems. It's scary enough to cause us to read all labels.
We have had some close calls where we checked the label as an afterthought. But this little girl has been trained well by her parents. If she is eating cereal, cookies, cereal bars, or anything baked she will sit there and wait for us to read the label. Sometimes we do find out last minute like we need to find her something else to eat.
It's important to realize that a lot of products are made in factories where peanuts are processed on the same machines. We don't take chances and the product will say so in the allergy section if that's the case.
At her age I would say the bigger fear is that she could get some peanuts or other type of nuts from dried fruit/cracker/nut mixtures. I would just keep those out of the house for awhile. There are certain products like that we don't buy even for our family because we fear that they could somehow get to this girl.
Also breads sometimes have nuts in them and even one orange juice company puts peanut oil in their juice. That's pretty strange but I heard from someone I know that her adult son had a reaction to the orange juice. So we check even unlikely places.
Ice cream treats are another common culprit.
Suzi