Scuffy the Tugboat (Little Golden Books, 1946)
I adore the Little Golden Books! I used to have quite the collection. A classic in the series was Scuffy the Tugboat (which I had). Scuffy is a tugboat who wishes for “bigger things” than just sailing in a bathtub. The Man with the Polka Dot Tie (who owns a toy store) and his son take Scuffy to a small brook and the current carries Scuffy away. The brook turns into a stream into a small river into a large river and Scuffy is soon overwhelmed by the size of things around him. As Scuffy is about to sail into the ocean, he is rescued by the Man with the Polka Dot Tie and his son and Scuffy is returned to his bathtub which happily pleases Scuffy.
Scuffy the Tugboat was written by American author Gertrude Crampton and illustrated by Hungarian-American illustrator Tibor Gergely.