And Granddad's can usually send them home, if they want a break. But, not always, sometimes, the Grandparents are fortunate to have their grandchildren live with them. Like in your situation John, just think of how well they will remember you in the future. Unfortunately, I was not fortunate enough to have any grandkids of my own, but, I sure spoiled and got my brother's grandkids wound up, before I sent them home.
Len