Bullfrog Books

What is a liquid? What are its properties, and how can it turn to a solid or gas? In Liquids, beginning readers learn about this state of matter and how it applies to their everyday lives.… More →

Do you know what the Jaguar logo looks like? In Jaguar, beginning readers learn about this car brand, when and where the cars were first made, what its logo is, and some of its most notable… More →

Did you know that many Ferraris are red? Do you know what the Ferrari logo is? In Ferrari, beginning readers learn about this car brand, when and where the cars were first made, what its logo More →

Did you know the first BMW car was made almost 100 years ago? Or that the 2024 4 Series BMW can go 180 miles per hour? In BMW, beginning readers learn about this car brand, when and where the More →

Did you know some Corvettes race? Or that they're made in Kentucky? In Corvette, beginning readers learn about this car brand, when and where the cars were first made, what its logo… More →

What is density? How does it affect whether an object sinks or floats? In Density, beginning readers learn how particles play a role in comparing the density of different objects. Vibrant,… More →

What is mass? How can we measure it? In Mass, beginning readers learn about mass and matter and how they apply to their everyday lives. Vibrant, full-color photos and simple diagrams… More →

What is a solid? What are its properties, and how can it turn to a liquid? In Solids, beginning readers learn about this state of matter and how it applies to their everyday lives. Vibrant,… More →

Did you know that Lamborghini doors swing up? In Lamborghini, beginning readers learn about this car brand, when and where the cars were first made, what its logo is, and some of its most… More →

What is volume? How can we measure it? In Volume, beginning readers learn about volume as it applies to measuring liquid and solid ingredients to bake cookies and fill a cookie jar. Vibrant,… More →

Did you know that a Porsche's engine is in the back of the car? In Porsche, beginning readers learn about this car brand, when and where the cars were first made, what its logo is, and some… More →

What is a gas? What are its properties, and how can it turn to a liquid? In Gases, beginning readers learn about this state of matter and how it applies to their everyday lives. Vibrant,… More →