Nice sentence! It’s playful. Here’s a simple way to make the punctuation clearer for a 5-year-old.
- Why change it? “Boop” is a little sound or exclamation. It works best as its own short piece, not connected by a comma.
- What to do: Put a period or exclamation mark before or after “boop” so the sentence reads clearly.
Two simple corrected versions:
- With its super nose, an echidna can feel a bug move in the leaves. Boop! Found it!
- With its super nose, an echidna can feel a bug move in the leaves — boop! Found it!
Either version is fine. The first is very clear and easy to read for young children.