This book was helpful to me, even as an adult and I know I would have loved this book as a child. Besides putting large concepts on a smaller scale for comparison, seeing things on a smaller scale also helps us see the significance of everything we have. For example, "If all the water on Earth were represented by 100 glasses...97 of the glasses would be filled with salt water...3 of the glasses would contain fresh water. One of the glasses would represent all the fresh water available to us." With colorful and imaginative pictures, these concepts can be seen in a new and easily relateable way. If... explores concepts from the galaxy, to species diversity, to money distribution, energy usages and population dynamics. At the end there is also extra information about activities to build more things to scale. A great book for wondering minds.
This book was received for free in return for an honest review.