But not all of those live close by and she wants to be a grandmother to as many children as possible.
Walker has served as a foster grandparent around Enid, including several years at a day care and currently at Hoover Elementary School.
She helps the teacher, whether that means reading to the children, dancing with them for exercise, or just listening.
They'll read about â€œTom Turkey,â€ use cookie cutters to create fake cookies to play with, or they'll â€œtell me stories of their little lives.â€
When â€œMama Dotâ€ enters the room, faces light up and children act as though they hadn't seen her in years.
Some have considered her a friend from the first time they met.
Others needed extra attention.
In one case, a 2-year-old girl wouldn't acknowledge anyone and when they tried to walk with her, she'd go a few steps and then sit down.
So Walker decided to meet her where she was. She too would stop right there and read a book to the little girl.
Before long, they were walking the hall together, with no stops, and when they returned to the room, they'd watch cartoons.
Some people wouldn't have the patience, but Walker feels blessed to have the opportunity to give of her time and love.
â€œI feel like this is a calling on my life; it's what God wants me to do,â€ she said. â€œI've always asked for a long, blessed life and I asked the Lord to help me be useful. I don't want to just live in this world and do nothing.
â€œHe's shown me what He wants me to do.â€