Rub-A-Dub-Dub! Achievement in Little Kitty, Big City

Much like Quack Troops! (25G), you need to reach the pond area in the center of the map next to the shrine where Mother Duck is. However, for this achievement, you need to find the four rubber ducks around the city, bring them to the pond, and drop them in. The first is right next to the pond but the other three are scattered all around the city. Refer to the following video for their locations.