Correcting Grammar for a 9-Year-Old: ‘Bonus! 4 Games on Flip Side’

Let's look at the phrase: “Bonus! 4 games on flip side”. The goal is to make it grammatically correct and easy to understand.

Here’s a step-by-step way to fix it:

1. Start with the word 'Bonus!' – This is good as it is because it catches attention.
2. Write numbers as words or digits? For small numbers like 4, especially in simple sentences, it’s often better to write them out word form: 'four'.
3. Remember to add articles like 'the' or 'a'. The phrase is missing 'the' before 'flip side'. It should be 'on the flip side'.
4. Keep it clear and friendly. So you could say: 'Bonus! Four games on the flip side.'

If you want to make it a full sentence, you could say: “Bonus! There are four games on the flip side.” But for short labels or announcements, the corrected phrase is perfect.

So, the correct version is:
Bonus! Four games on the flip side.