What reading level is It's Earth Day!?

It's Earth Day! by Mercer Mayer is at a Level 2-3 reading level. Recommended for Lower Grades readers (Ages 5-8).

What age is It's Earth Day! appropriate for?

It's Earth Day! is recommended for Ages 5-8. HootRating: 7C (Clear).

What genre is It's Earth Day!?

It's Earth Day! is fiction — Juvenile Fiction. Part of the Little Critter series.

Does It's Earth Day! have any content warnings?

It's Earth Day! has a HootRating of 7C (Clear). No specific content flags noted. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is It's Earth Day!?

It's Earth Day! by Mercer Mayer is 28 pages (approximately 637 words).

Reviewed by HootRated editorial · Last updated May 18, 2026

It's Earth Day!

Mercer Mayer

It's Earth Day!

Age Rating, Reading Level & Content Guide

by Mercer Mayer

Little Critter

Reading Level 2-3 7C Ages 5-8 Balanced Read Page-Turner

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

Little Critter wants to help the planet after learning about climate change. With his family and friends, he discovers fun ways to save water, save energy, and recycle. Together, they plant trees and find ways to protect animals like polar bears.

Themes

FamilyEnvironmental ProtectionFriendship Science & Nature Adventure

Quick Assessment

This is a Level 2-3 book with gentle content intensity. No notable content concerns flagged. Written for readers ages 5-8.

Why we rated It's Earth Day! 7C

It's Earth Day! is written at a Level 2-3 reading level across 28 pages (approximately 637 words). Strong independent readers around grade 3.9 can typically handle this book on their own; with parent or teacher support, It's Earth Day! works for readers up to grade 4.9.

Read aloud, It's Earth Day! takes about 4 minutes, which fits within a single read-aloud session.

We rate It's Earth Day! 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, It's Earth Day! explores family, environmental protection, friendship, science & nature, and adventure — 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.
✓ Reluctant readers who need fast-paced, hook-heavy stories to stay engaged.
✓ Kids drawn to stories about family, environmental protection, friendship.
✓ Readers who fall hard for one book and want a long series to live in — there are 80 more books in the Little Critter series.