Kids party invited and than uninvited question  

This is just too rude for words, I think this child's parents need to be asked some very direct questions,I can not blame the child as perhaps he didn't have a say in who was invited, but to do this to children is so wrong. I have no idea how you can explain to your children why they were not invited, I am sure they are hurt and rightly so, I would let the child's parents they have the right to invite whom they wish but in future please advise you of any party plans that your children are not invited to so that you may make plans to have the children away from the sight, because children will remember and thats when it goes from bad to worse. Such a sad story.Such ignorant people

Kids can be very cruel, they always have falling outs so maybe this little boy & your little boy had a fight over something which is why they weren't invited.
I think it's a little hard with kids coz they swap & change friends constantly, although that doesn't make it right fir them to be invited & then uninvited.
Have you perhaps spoken to the little boys parents to find out what happened & why your kids weren't invited in the first place?
I think that might be the way to go coz it's not right if they were responsible for the inviting & then the quick uninviting.
If it were me, i'd be speaking to the parents for sure to find out why things went the way they did & also why they weren't invited in the first place, especially since that boy & your kids have been friends for so long.

There are people out there that have no clue as to how easy it is to hurt a child's feelings. They think more on themselves than anyone else. If the boy is a friend of the family, still invite him over. It is not his fault that his parents lack in social graces.