A Japanese boy keeps himself entertained on a long train ride by playing with his ninja paper doll - sticking it to the carriage window.<br /><br />The boy's mother Sato Fuki made the figure for her son to keep him busy while travelling in Tokyo, Japan on January 17.<br /><br />The red ninja was pasted on a clear acrylic so the boy can make it appear to jump through the railway lines and overhead cables as the train speeds along the tracks.<br /><br />Aside from being a mother, Sato Fuki is also a toy-maker who conceptualizes models that people can easily make at home.<br /><br />She said: ''This is a great way to keep children busy when they are on long train journeys. It also stimulates their imagination.''
