Grammar help for a 6-year-old: Correcting “Yachts are like houses on water” — simple corrected sentence and explanation

Original: Yachts are like houses on water: homely comfort +easy travel and fun.

Corrected (child-friendly): Yachts are like houses on water. They are cozy, easy to travel on, and fun.

Why this is better (simple steps):

1. We use a period (.) to make two short sentences instead of the colon (:). This makes it easier to read.
2. We change homely to cozy or comfortable because homely can be confusing. Cozy is a nice word for a 6-year-old.
3. We replace the plus sign (+) with the word and so the sentence sounds natural.
4. We say easy to travel on so it clearly tells how you use a yacht.

Another very simple version: "Yachts are like little houses on the water. They are cozy and fun to ride on."