20,000 baseball cards under the sea
Jon Buller
20,000 baseball cards under the sea
Age Rating, Reading Level & Content Guide
by Jon Buller
The text is written at a 1st 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
Roger and Kenneth dive deep beneath the waves in their sea vehicle, the water swirling all around them. Suddenly, the cave entrance looms ahead, dark and mysterious. What secrets will the old baseball cards hidden inside reveal?
Themes
Quick Assessment
This early-reader fiction book follows two boys, Roger and Kenneth, as they explore an underwater cave searching for buried treasure in the form of old baseball cards. Suitable for children ages 5-8, it encourages imagination and introduces themes of adventure and discovery without any intense content. The story is simple and engaging, ideal for young readers beginning to explore chapter books.
Why we rated 20,000 baseball cards under the sea 6C
20,000 baseball cards under the sea is written at a Level 1-2 reading level across 47 pages. Strong independent readers around grade 2.5 can typically handle this book on their own; with parent or teacher support, 20,000 baseball cards under the sea works for readers up to grade 3.5.
We rate 20,000 baseball cards under the sea as 6C ("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, 20,000 baseball cards under the sea explores adventure, friendship, inventors, buried treasure, and baseball — 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 adventure, friendship, inventors.
Maybe not for
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
6C — ClearNo conflict beyond everyday childhood experiences. Safe for sensitive readers.
Was our "Gentle" content intensity rating accurate for this book?
Reading Insights
Hook Factor
2/10A 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
- 0679815694
- Pages
- 47
- Publisher
- Random House Books for Young Readers
- Published
- 1991
- Type
- Fiction