Children's books "Grandpa, how do Ships, float?" (Popular Science for Children Ages 4-8, Books' Series Book 3)

This Popular Science for Young children, series books were written after endless hours of happiness joy and endless curious questions of “What's that?", "How?" and “Why?". These questions are cardinal questions that young children and scientists have asked since the creation of man.
This book about “Floating Bodies” is the Third book in this collection which was written with the intention of helping my young grandchildren understand “How great ships made of iron, loaded with large containers, can float while they sink like a stone in the swimming pool?”
This is a story that takes us back to early times; to the days of the ancient Rome and its wars against the ancient Greek city-states. The story is about the grate scientist Archimedes of Syracuse. One day, while taking a bath, an important discovery made Archimedes very excited. He was so excited that he jumped out from his bath and forgot to put on his clothes. He ran naked along the streets of his city, Syracuse, and shouted all the way home “Eureka! Eureka!,” a word in ancient Greek which means, "I have found it! I have found it!” The word, eureka, is still used today by someone making a surprising discovery.
Entries mentioned
I mention and explain in this book, to my grandchildren, about the entries, as follow: -
Archimedes of Syracuse;
The Claw;
The Catapult;
Robotrik;
Regularly shaped body;
Finding the volume of an object with an Irregular Shape;
Buoyancy Principle of Floating Bodies;
Swim Bladder
Aircraft carrier.
And more.