Dinosaurs Big and Small demonstrates how long and tall dinosaurs were and more importantly to me, she talks about how we know this information. The next question most kids, and adults might have is how heavy dinosaurs were. Kathleen handles this extremely well. Scientists don't actually know how heavy dinosaurs were and can only make some well educated guesses.
The best part of this book is how they measure things. While using standard measurements of feet and pounds for everything, she also puts the measurements in context for kids by measuring in kid units. She also measures in elephants for weight which is a way scientists do to.
I give it a 4 out of 5 stars.