Reviewed by HootRated editorial · Last updated September 10, 2026

Belly-busting Worm Invasions!: Parasites That Love Your Insides! (24/7: Science Behind the Scenes)

Thomasine E. Lewis Tilden

Belly-busting Worm Invasions!: Parasites That Love Your Insides! (24/7: Science Behind the Scenes)

Name: Belly-busting Worm Invasions!: Parasites That Love Your Insides! (24/7: Science Behind the Scenes)
Author: Thomasine E. Lewis Tilden
ISBN: 9780531120682

Age Rating, Reading Level & Content Guide

by Thomasine E. Lewis Tilden

Medical Files; 24/7 Science Behind the Scenes

Reading Level 5-6 LP · Mild · Physical Ages 13+ Balanced Read Page-Turner

The text is written at a 5th grade reading level, the subject matter is intended for teens (ages 13+), and the content is mild with minimal sensitive material. Its HootRating code, LP, means mild content, mostly physical.

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About This Book

Discover the fascinating world of parasites that live inside us and the brave scientists who battle these tiny invaders. Explore real-life stories that reveal the surprising ways parasites affect our bodies and how experts work to keep us healthy. Dive into a thrilling mix of science and adventure that uncovers the secrets of these hidden creatures.

Themes

Science & NatureBiologyAdventure

Quick Assessment

This is a Level 5-6 book with mild content intensity. Content themes include mild peril, science & nature. Written for readers ages 13+.

Why we rated Belly-busting Worm Invasions!: Parasites That Love Your Insides! (24/7: Science Behind the Scenes) LP (Mild)

Belly-busting Worm Invasions!: Parasites That Love Your Insides! (24/7: Science Behind the Scenes) is written at a Level 5-6 reading level across 64 pages (approximately 6,650 words). Upper Grades (Ages 13+) is the typical interest range for this book — readers in that age band have the maturity and attention span suited to the story, separate from whether they can decode the words.

Read aloud, Belly-busting Worm Invasions!: Parasites That Love Your Insides! (24/7: Science Behind the Scenes) takes about 44 minutes, which fits within a single read-aloud session.

We rate Belly-busting Worm Invasions!: Parasites That Love Your Insides! (24/7: Science Behind the Scenes) as LP (Mild, mostly physical) because the content sits in the "Mild" range — mild conflict — the kind a child encounters in normal play and sibling life. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly mild; no single dimension stands out as a concern.

Specific content flags noted by reviewers: Mild Peril, Science & Nature.

Thematically, Belly-busting Worm Invasions!: Parasites That Love Your Insides! (24/7: Science Behind the Scenes) explores science & nature, biology, and adventure — these threads give the book room to mean different things to different readers.

Good fit for

✓ Children in the Ages 13+ 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 science & nature, biology, adventure.
✓ Readers who fall hard for one book and want a long series to live in — there is one more book in the Medical Files; 24/7 Science Behind the Scenes series.
✓ Curious kids who prefer real-world topics over made-up stories.

Maybe not for

! Readers looking for something heavier — this is a gentle, low-stakes story by design.

For Parents

Content Intensity

LP · Mild · Physical

Emotional

Gentle

Physical

Mild ←

Social

Gentle

Thematic

Gentle

Reading the HootRating code: the first letter is the content intensity (C = Gentle · L = Mild · M = Moderate · I = Intense · V = Very Intense); the second, when there is one, is the kind of content that drives it (E = Emotional · P = Physical · S = Social · T = Thematic). Reading level and age range are rated separately. How we rate

Light conflict or tension. Mild peril resolved quickly.