It is perfectly permissible for grandparents to spoil their grandkids.
Grandparents can get away with things that the parents would never be able to get away with because the grandparents have the grandkids for a very short time and they just love to spoil them.
But if the parents did something like all the time they did have raised some very spoiled children, who probably couldn't make it for themselves in the real world as they grew up.
Grandparents should explain their grandchildren that they realize they're not supposed to spoil them, but they have decided to do it anyway.
And as you might've guessed the grandkids have no problem with this, they like that idea.
That's why grandkids are always asking their parents to go see grandma and grandpa.
Sometimes a parent will get upset with grandparents that spoil their kids too much, but there's not much they can do about it.
This gives the grandparents all the advantage; they can get away with all kinds of stuff.
As long as the grandkids aren't taking advantage them, everything is okay.
Indeed, if the parents complain that the grandparents are spoiling the kids too much, generally the grandparents will put up a big fight, or are they will beg for forgiveness; claiming that they are sorry for spoiling grandchildren, but they're really not and they probably are going to stop.
Parents should get used to this fact and just deal with it.
The kids know that the grandparents love them, and that something is very important to their self-esteem.
In fact, it established a tradition, and the kids will remember when they are grandparents that it's okay to spoil their grand kids too.
Please consider all this.