Sam and Julia visit the sailor's grandfather in the harbor. How many things can be seen and done there! In addition, a boat race is currently underway. Uncle Jan - the handyman - teaches Sam and Julia how to build a boat out of old bottles and wood. However, not everything goes smoothly during the race. Fortunately, Julia never gives up and Sam always finds a good solution. But will they still win the competition?

This is the fifth book about life in My House. This time, the delightful model shows all the nooks and crannies of the mouse port and tells about the port customs in a colorful way.