Tricycles

Abie & Benjamin enjoyed riding their tricycles together the other evening. There is a slight slope in the driveway to assist. However this only works in one direction. Benjamin definitely has his own style of riding. No sitting for him, it's just standing. How does he propel himself? See the video. (naturally it's not as obvious on camera because it's on film, but right at the beginning you'll see his technique that gets him going)