Dear Grandma and Grandpa, thank you. A study commissioned by Grandparents.com details the spending power of the grandparent economy and predicts continued strength. The average grandparent spent $5000 on games, toys arts and crafts in 2009, it says. Grandparents also took on bigger ticket items, filling the gaps for their budget-pinched adult children so that the grandkids would not go without nice apparel, trips, education and luxuries. Have you marketed successfully to the important grandparent economy? What has worked for you?