Aaron likes putting paper in his mouth, so if he's on the floor for tummy time and there's a newspaper or magazine on the floor, he's off like a rocket. Of course, I play keep-away, moving the item further away from him, sometimes making him U-turn.
Amy predicts that he'll be crawling on his knees in two weeks. I won't make any predictions myself. But I can definitely say that the little guy can really scoot.