Cobalt
Paula Johanson
Cobalt
Age Rating, Reading Level & Content Guide
by Paula Johanson
The text is written at a 3rd 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
Cobalt is not just any metal—it's a superhero of the periodic table! From powering colorful paints to helping batteries come alive, cobalt’s special powers make it a star in science and everyday life. Discover why this shiny element is more important than you ever imagined.
Themes
Quick Assessment
This engaging early reader introduces children aged 5-8 to the element cobalt, explaining its properties, natural occurrence, and practical uses in a clear and accessible way. The book fosters curiosity about chemistry and metals while supporting foundational science learning for young readers. Its straightforward factual content is suitable for early elementary students with no sensitive material.
Why we rated Cobalt 8C
Cobalt is written at a Level 3 reading level across 56 pages. Strong independent readers around grade 4.0 can typically handle this book on their own; with parent or teacher support, Cobalt works for readers up to grade 5.0.
We rate Cobalt as 8C ("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, Cobalt explores science & nature, chemistry, educational, and metals — 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, chemistry, educational.
- ✓ 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
8C — 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
- 9781608546459
- Pages
- 56
- Publisher
- The Rosen Publishing Group, Inc
- Published
- 2009
- Type
- Nonfiction