Socks that don't slip

We have stairs in our new house. Three stories. The kids are going up and down constantly. It's a baby gate nightmare (for upcoming baby van der Horst). But the girls have it down except for a slip here and there. Aunt Kelly heard about this and took action to help the girls become slip proof. She sent us some wonderful animal socks with rubber spots on the bottom to prevent slipping. The girls love them: