Is one of the characters in your picture book "grandma"? Is "grandma" the main character, or as prominent a character as the child in the story?
If so, pause. Consider whether your book is for children, or if it is, in fact, for grandma.
Some of you, the guilty ones, are saying to yourselves, "It's for children and grandmothers! It's for them to enjoy together!"
Ha, ha. Guess who are the only people who enjoy reading about grandmothers?
I know, some of you are thinking of your own twinkly-eyed grandmothers, or of your own twinkly-eyed selves, and are thinking something along the lines of "Who does that whippersnapper of an editor think she is? Why, in my day..."
Yeah. In your day, children still cared more about themselves, their friends, and their parents than they did about their grandparents. To small children especially, grandparents are conveniences like the car or the refrigerator: grandparents take children nice places and give them yummy treats. It's true that the car and the refrigerator cannot hug children, but they also can't pinch their cheeks. Life is full of trade-offs.
There should be a special term for the euphoric obsession experienced by grandparents. And, yes, sometimes it's a positive thing. And other times it's in my inbox.