My boys play this game all of the time. Andrew will crawl all through the house, and Joey will follow him. Andrew turns to make sure that Joey is still there. When he sees that his brother is still following, he will giggle. That giggle makes Joey giggle. I just love hearing them both so tickled. Andrew never crawls except when he wants to play this game. As soon as Joey is able to walk, I am sure that they will create many more games together!