Sounds like you're doing it right!
Spoil them, and send them back for mommy and daddy to deal with, eh? LOL!
Can you imagine - our only son (so far, at least, more will be coming God willing) is 19 months old, and had ALL FOUR GRANDPARENTS here spoiling him just a couple of weeks ago!
I only met my grandparents a few times and they had so many other grandchildren that they really didn’t care that much.
My husband grew up with his and my kids grew up with theirs and I think having them is so much better.
And yes, we do spoil them. They are teenagers now and they still like to come over.