I was lucky enough to have both sets of Grandparents live within minutes of my home. My Dad's parents lived next door to us while I was growing up.
I entered my Grandpa's name, no dates, and the State we live in.. and up popped several documents about him. The most fun was the 1920's Census. Grandpa was only 10 at the time it was taken. He had MANY (like 10) brothers and sisters that lived at home at the time. The census gives names, ages, occupations, education levels...
WAY TOO MUCH FUN!!
I'm heading back there in the morning. I love to find out about the people that made my life possible. It makes them real to me.