Corrected sentence (one line):
A balloon fills with hot air and floats up into the sky.
As a short poem with line breaks:
A balloon fills
with hot air
and floats up
into the sky.
Simple notes for a 5-year-old:
- Start the sentence with a big letter: A
- Use "into" to show the balloon is moving up into the sky
- Put a period at the end to finish the sentence.
Great sentence — you did a wonderful job describing the balloon!