My youngest was a biter. His older brothers frequently cried out "He's going to bite me!". The biting was usually linked with frustration because he couldn't get what he wanted or they were blocking his access. The arm put out to stop him was so tempting.
I would explain to your GS that sometimes when they are unable to get something or do something some people lose control and bite out of frustration. Tell him it is a realy rare occurence so probably will never happen again, and the boy didn't really mean to hurt him. Point out that there are lots of other children in play school so he could play with any of them and avoid the biter if he wants to. He may need an adult to stay with him for a little bit at the start of each day just like some children do when they start. I'm sure he will adjust and settle down again.
Gagajo The biter has grown into a thoughtful, gentle, caring young man. I'm sure your DGS will be fine.
Lame Limericks (but they are funny anyway) (
apple trees not flowering this year. Anyone else?