Original: "Ships travel on invisible roads across the seas. They bring things between faraway lands and give travelers a safe, comfy ride."
Corrected (simple): "Ships travel on invisible roads across the sea. They carry things to faraway lands and give travelers a safe, comfortable ride."
Why I changed it:
- "sea" instead of "seas" — both are okay, but "sea" is a little simpler for young readers.
- "carry things to faraway lands" sounds clearer than "bring things between faraway lands" for saying where the items go.
- "comfortable" is the full word for "comfy" — "comfy" is fine to say, but "comfortable" is a little more formal.
Your original sentences were already correct and easy to understand. Nice work!