Meaning: This sentence is saying that wonder can lead you to discover new and exciting things.
Choice of Words: Wonder is a feeling of surprise and curiosity about something. Opens means to make something possible or accessible. Doors are things that you can go through to get from one place to another. Worlds are places where people live and things happen. When you put them together, "Wonder opens doors to new worlds" means that wonder can lead you to discover new and exciting things.