Unfortunately the peculiarity of nut allergy means a severe reaction can manifest just by the child being near someone else who has eaten nuts. As said over and over again above. It isn't simply a case of telling billy bob not to eat nuts and all will be ok. If only life was that simple.

Thank goodness some schools have taken the measure to ban the things, as adults clearly have trouble comprehending the fundamentals of the situation. No matter how often it is explained to them.

With any luck your grandson will outgrow his allergy in early childhood. Nut allergists on the whole suffer it for life.