BB, Lukey, and Pop-Pop are eager to launch their new little boat and enjoy a day on the water. Shortly after their small boat departs from the shore, the inhabitants of the pond engage them. A pretty pink fish named Rosie greets BB with a pleasant surprise. While Lukey giggles over BB's experience, he encounters an adventure of his own.BB and the Little Boat is the fourth book of the BB series. The story takes place on a pond located on their mini-ranch in Orangefield, Texas.