National Grandparents Day - A detailed look at how the holiday began, along with suggested activities.
Happy Grandparents Day - A short history of this came to a national observance in the United States.
Grandparent's Day History - Explains the purpose of the day, provides a short history, and includes a list of ideas for observing it.
Census Bureau Fact Sheet - Census facts For Grandparents Day.
Billy Bear says... Happy Grandparent's Day - Offers electronic postcards, craft projects, and other activities.
Celebrating Grandparent's Day - Site features both online and printable activities, greeting cards, wallpaper, coloring cards, and additional resources to celebrate Grandparents Day.