The science of snot and phlegm
Fiona MacDonald
The science of snot and phlegm
Age Rating, Reading Level & Content Guide
The Slimy Truth about Breathing
by Fiona MacDonald
The text is written at a 2nd grade reading level, the subject matter is intended for younger children (ages 5–8), and the content is gentle with no concerning themes.
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About This Book
Have you ever wondered why your nose gets all stuffy and gooey? Every breath you take brings in tiny heroes like mucus and snot that help keep you healthy in surprising ways. But what exactly do these slimy substances do inside your body?
Themes
Quick Assessment
This early reader book explains the science behind breathing and the role of mucus and snot in a simple, engaging way suitable for children ages 5 to 8. It introduces basic respiratory concepts and body fluids with a mix of fun facts and approachable language. Parents should note the focus on bodily functions, presented in a lighthearted and educational manner.
Why we rated The science of snot and phlegm 7C
The science of snot and phlegm is written at a Level 2 reading level across 32 pages. Strong independent readers around grade 3.0 can typically handle this book on their own; with parent or teacher support, The science of snot and phlegm works for readers up to grade 4.0.
We rate The science of snot and phlegm as 7C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.
No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.
Thematically, The science of snot and phlegm explores science & nature, body fluids, respiration, and juvenile literature — these threads give the book room to mean different things to different readers.
Good fit for
- ✓ Children in the Ages 5-8 range — the maturity and attention span match the story's pacing.
- ✓ Patient readers who enjoy slower, character-driven stories.
- ✓ Kids drawn to stories about science & nature, body fluids, respiration.
- ✓ Curious kids who prefer real-world topics over made-up stories.
Maybe not for
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
7C — ClearNo conflict beyond everyday childhood experiences. Safe for sensitive readers.
Was our "Gentle" content intensity rating accurate for this book?
Reading Insights
Hook Factor
1/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9780531231449
- Pages
- 32
- Publisher
- Franklin Watts
- Published
- 2018
- Type
- Nonfiction