We all know the tooth fairy, or in many Spanish-speaking cultures, the little mouse who trades coins for teeth. Luis Coloma's Ratón Pérez gives that mouse a name, a home, and a whole lot of personality.

The Story

The story introduces us to Ratón Pérez, a polite and hardworking mouse who lives in a biscuit box in a Madrid confectionery shop. His mission? To collect the lost baby teeth of children, leaving a small gift in return. His life gets a shake-up when King Borbón asks for his help. The king's young son, Prince Buby (a nickname for the future King Alfonso XIII), is terrified of mice. To cure him, the king has a wizard shrink Buby down to mouse size so he can become Ratón Pérez's apprentice for a night.

What follows is a wonderful adventure through the nooks and crannies of the city. Buby, now mouse-sized, sees the world from a whole new angle. He learns about Ratón Pérez's work, meets his mouse family, and discovers that bravery isn't about being big, but about having a good heart. It's a journey that changes the little prince forever.

Why You Should Read It

This book is a delight because it takes a simple, universal childhood ritual and builds a complete world around it. Ratón Pérez isn't a magical creature from a far-off land; he's a neighbor. He has a family, a home, and a sense of duty. Coloma writes with a warmth that makes you believe a mouse could truly be a kindly, bespectacled collector of memories.

The friendship between the refined mouse and the initially frightened prince is the core of the story. It's about overcoming fears through understanding and finding common ground with someone who seems totally different. The shrinking premise is pure fun, letting us imagine what our own homes look like from a tiny viewpoint.

Final Verdict

This is a perfect read-aloud for families with young children who are starting to lose teeth—it turns a sometimes-wobbly moment into an exciting story. It's also a sweet pick for anyone who loves classic fairy tales or is curious about the stories behind cultural traditions. More than just a kids' book, it's a little piece of literary history that gave a beloved character his name. If you want a short, charming story that feels both nostalgic and fresh, invite Ratón Pérez into your home.