Axis Toys & Gifts Sassi What How and Why Inventions Book and Poster

Many different inventions have changed human history. Who invented the wheel? When was soap first used? How did ski schools come to exist? Who invented vaccines? These and many other questions about the most exciting ideas that changed the world are answered in the pages of this incredible book. An easy to-read encyclopaedia that uses a Q&A format to pique curiosity and develop analytical skills and independent thought.