SPRAK is a realistic fiction story about spreading kindness and generosity.

The story shows how one simple act of kindness can spread from person to person, much like a row of dominoes, creating a chain reaction of generosity throughout the community. It teaches the idea of “paying it forward”—when someone receives kindness, they pass it on to someone else, allowing kindness and love to continue spreading.

Why Is Mars Red?

This section explains the geological features of Mars, particularly the large amount of iron oxide (rust) in its soil, and explores how this gives Mars its distinctive red surface.

The History of Human Exploration of Mars

This section provides a detailed account of NASA’s Mars exploration programs, including the launch of various probes, landers, and rovers to study the Red Planet.

Mars Through the Eyes of Scientists

This section summarizes what scientists currently know about Mars, including its climate, atmosphere, and geological features that provide evidence that liquid water may once have existed on the planet.

Here is the English translation of the core content breakdown:

Core Content Breakdown

What Is Memory? Introduces the basic definition of memory—the process by which the brain records past experiences and learned knowledge, allowing us to recall them later. 

Brain and Memory: Uses simple illustrations and scientific terms to explain the core parts of the brain responsible for memory (such as the Hippocampus). It teaches children that different types of memories are actually stored in different areas of the brain. 

Types of Memories: This is the core science section of the book, which distinguishes between three main types of memory:

Sensory Memory: Instantaneous information captured through sight, sound, smell, and other senses, which vanishes in a split second.

Short-Term / Working Memory: The brain's temporary "workbench." For example, when you look at a phone number, you can only hold it in your head for a few seconds.

Long-Term Memory: Memories that are consolidated and can be stored for months, years, or even a lifetime—such as your name or how to ride a bike. 

The Process of Memory: Uses a step-by-step logical flow to introduce the four stages of memory formation:

Encoding: The brain receives and translates external information.

Storage: Organizing and filing the information away.

Consolidation: Turning short-term memory into long-term memory through repetition and sleep.

Retrieval: Recalling and fetching the memory when needed. 

Forgetting & Memory Failures: Briefly explains why we forget things and the scientific principles behind memory decay (such as the forgetting curve or the weakening of neural connections).

The Little Fir Tree is a fable adapted from Hans Christian Andersen’s classic fairy tale The Fir Tree. It tells the story of a little fir tree that is always longing for the glamour and glory of the future. Because it fails to appreciate the happiness it has in the present, it ultimately meets a tragic end.

This book explores the many aspects of medieval European castles.

Castle Construction and Defense: It explains why castles were designed in certain ways, what materials were used to build them, and how different defensive features—such as moats, thick walls, and towers—helped protect the people inside.

Life Inside the Castle: It describes the different social classes who lived in castles, including kings, lords, knights, and servants, and explores what their daily lives were like.

The Role of Castles: Castles were not only military strongholds built to defend against enemies, but also important centers of political power and administration.

The Decline of Castles: The book explains why castles gradually declined as times changed and military technology advanced, especially with the development of cannons and gunpowder weapons.

Kenny can't concentrate on the big race because he feels guilty. The night before, he asked his father not to come. Will Kenny win the race, and will his father show up?

The Remaining Pine Trees: The last few pine trees in the forest, Momma Pine and Poppa Pine, discover a logger. They are terrified, believing that the logger is going to cut them down and turn them into Presto logs.

Trying to Stop the Logger: To protect themselves, the two pine trees come up with all kinds of tricks to tease, distract, and interfere with the logger, doing everything they can to stop him from doing his job.

A Surprising Twist: In the end, they are surprised to discover that the logger has no bad intentions. Instead, he wants to take them away as beautiful Christmas trees. Once they learn the truth, the pine trees’ attitude toward the logger changes dramatically.

The story The Farmer and the Horse retells the classic ancient Chinese fable "The Old Man at the Fort Losing His Horse" (塞翁失马，焉知非福). Through the wise man's calm and unruffled attitude toward the loss and return of his horse, it teaches that we should not judge events purely by their immediate, surface appearance as good or bad.

Plot Summary

The Horse Runs Away: The old farmer's horse runs off. The neighbors commiserate, calling it bad luck, but the farmer simply replies, "Maybe, we'll see."

The Horse Returns with Wild Horses: A few days later, the escaped horse returns, bringing several wild horses with it. The neighbors congratulate him on his great fortune, but the farmer remains calm, saying again, "Maybe."

The Son Breaks His Leg: While trying to tame one of the wild horses, the farmer's son falls and breaks his leg. The neighbors consider this a terrible misfortune, yet the farmer remains unfazed.

Exemption from Conscription: Soon after, war breaks out. All the young men in the village are drafted into the army, but the son is spared because of his broken leg, ultimately saving his life.

Core Moral Most readers reach a consensus that the story conveys a fundamental truth: good and bad fortune are interdependent. A temporary setback may bring unexpected blessings, just as a stroke of luck can lead to misfortune. Therefore, one should maintain a calm and detached mindset when facing life's ups and downs.

On Eagle River tells the story of a young boy named Devon who goes canoe fishing with his grandfather on the river for the very first time.

Main Story Summary

Departure and Anticipation: Devon is thrilled, but his older brother had previously told him scary fishing stories—like giant snakes sliding off logs to steal catfish—leaving him feeling a mix of excitement and anxiety.

Scenery Along the Way: The views along the river are beautiful. They hear the calls of eagles high up in the tall sycamore trees as their canoe glides quietly across the water.

Overcoming Fear: Guided by his grandfather's patience and encouragement, Devon helps control the canoe, gradually overcomes his fear of legendary snakes or wild animals, and learns to enjoy the experience of fishing.

Eleven-year-old Keisha and her 43-year-old father, Mr. Jones, arrived at a beautiful mountain lake in the jungle carrying heavy backpacks to set up camp after a long hike. 

A Sudden Chill: Late at night, the temperature plummeted. Keisha woke up freezing and shone her flashlight around, surprised to find a layer of ice forming on the inside walls of the tent. This moment gives the book its title, The Icy Tent. [1]

Science Woven Through the Story (The Three States of Matter)

Through conversations between Keisha and her father, the story vividly explains how water molecules change states:

Evaporation & Gas: When her father boils water on the camping stove during the day, he explains that boiling water turns into a gas (water vapor) and rises into the air.

Condensation & Liquid: As people breathe inside the tent, they exhale warm water vapor. When this warm vapor touches the freezing-cold tent fabric at night, it condenses into tiny liquid droplets.

Freezing & Solid: Because the temperature outside the tent drops so low in the middle of the night, those small droplets on the inner walls eventually freeze into solid ice.