Best Science Fiction Books for 3rd Graders (2026): 4 Compared

Aliens and rockets, and the best science fiction books for 3rd graders make them fun. We compared four books by sci-fi fit, publisher and reading age, using only what each Amazon listing states. Every figure below comes from the listings, not from our own reading. Note: one is nonfiction.

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The picks

#	Product	Shelf Score	Buy
1	The Stinkersons of Outer Space	9.8/10	Buy
2	Aliens for Breakfast	9.7/10	Buy
3	Incredible Stories for Kids	9.6/10	Buy
4	Third Grade Science Project	9.6/10	Buy

1

The Stinkersons of Outer Space

Corey Mills·9.8/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

A sci-fi book for 3rd graders, 96 pages, reading age 6 to 9 years, published August 1, 2025.

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Pros

• 96 pages; 2025 edition
• Book 1 of 4
• Reading age 6 to 9 years, from customers

Cons

• 2025; very new
• Gross-out humor
• 96 pages

2

Aliens for Breakfast

Stephanie Spinner·9.7/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

A sci-fi book for 3rd graders, 64 pages, reading age 6 to 8 years, published October 22, 1988.

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Pros

• 64 pages; Random House
• 1988 edition; reissue
• Reading age 6 to 8 years, from customers

Cons

• 1988; older
• 64 pages; short
• Trilogy; old

3

Incredible Stories for Kids

Fred Flynn·9.6/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

A nonfiction book for kids, 116 pages, reading age 6 to 10 years, published August 22, 2024.

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Pros

• 116 pages; 2024 edition
• Reading age 6 to 10 years, from customers
• Nonfiction

Cons

• Not science fiction
• 2024; newer
• 116 pages

4

Third Grade Science Project

Mary Jane Auch·9.6/10 Shelf Score

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The Shelf Score runs from 9.2 to 9.8 and weighs fit for the reader or goal (35 points), contents and edition (25), value (25) and listed reading age or level (10, where the listing gives one), using only what the book listing states. How we pick ›

A sci-fi book for 3rd graders, 112 pages, reading age 8 to 12 years, published October 12, 1999.

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Pros

• 112 pages; Yearling
• 1999 edition; reprint
• Reading age 8 to 12 years

Cons

• 1999; older
• Reading age not from customers
• 112 pages

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More picks to compare

• A Rover's StorySuits readers wanting Jasmine Warga, Mars rover.Check on Amazon

Compare the picks

Specs as published on each listing, collected 17 October 2026.

How we scored them

The Shelf Score weighs sci-fi fit, publisher, value and reading guidance. Three listings state reading ages from customers. How we pick explains the weights.

Scores run from 9.2 to 9.8: each book’s point total is placed on that range, so more points always means a higher score. Reading age or level counts on a list where at least one listing gives one, and a book whose listing gives none then scores zero on it. Where no listing gives one, the score is taken over the other 85 points. Books carry no warranty, so warranty is not scored.

How to choose the best science fiction books for 3rd graders

Sci-fi fit

Three are sci-fi; one is nonfiction. Browse middle grade books for more.

Age fit

Reading ages run from 6 (Aliens) to 8-12 (Science Project). Our sci-fi novels for kids list covers more.

Length

Page counts run from 64 (Aliens) to 116 (Incredible Stories).

Before you buy

• Check the reading age.
• Compare the 64 to 116 page counts.
• Sales claims in the descriptions are the publisher’s; treat as marketing.

Frequently Asked Questions

Which is about aliens?

Aliens for Breakfast.

Which is about space?

The Stinkersons of Outer Space.

Which is the longest?

Incredible Stories for Inquisitive Kids, at 116 pages.

Which is the shortest?

Aliens for Breakfast, at 64 pages.

Still deciding? Our top pickThe Stinkersons of Outer Space

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Related lists

See every middle grade list and all kids and teens lists.

More lists: sci-fi novels for kids, sci-fi for middle schoolers and sci-fi for 11 year olds.