One of our grandchildren has four sets of grandparents. To say she is spoiled by them is an understatement.
We love indulging her but hope we spoil her with love rather than material things and her Mummy likes it that when she stays with us, the same rules as her home ones apply. The GC bring us so much pleasure though that we hope all their time spent with us is good, happy, and fun and will give them a memory store for when they are older and leading their own teenage lives.
We pull out all the stops to have fun times, much more so than when our own children were young. Being so busy as parents was all about parenting 24/7 whereas being a grandparent is so different, isn't it?