Meaning: This sentence describes a child looking out the window, completely fascinated by the raindrops dancing on the windowsill.
Choice of Words: Child is a young person. Gaze means to look at something for a long time, often with great interest or admiration. Out means away from or outside of something. Window is an opening in a wall or door that allows light and air to enter. Mesmerized means to be completely absorbed or fascinated by something.