When they grow older, we all get concerned that our children are getting fat or obese. Luckily, they're not alone. A large percentage of Americans have a grandparent who is overweight or obese. We've probably all had a conversation about it with our grandparents at some point. We can't blame them for being worried. After all, we're not the only ones. The majority of us have grandparent relatives who are overweight or obese, and we can learn a lot from their experiences..