I have a question about living near grandparents.
I may be the exception but my mom is 5 minutes away and my dad/mimi are 35 minutes away.
With the exception of my FIL who lives in Colorado all of my kids grandparents live nearby.
I'm with Laura. My Mom is about 15 minutes away, and I wouldn't trade it for the world. During the school year she picks Lana up from school at noon twice a week, and they both adore their time together. Lana definitely gets away with a little more there, and has more treats than at home, but if that's my biggest problem, I'm a very lucky Mom.
We don't have any special rules or anything, I guess we haven't needed to.