100 Facts- Inventions

100 facts inventions book for kids is bursting with exactly 100 fascinating facts, awesome images and fun activities to help children learn everything they need to know about discoveries, developments and creations.
100 facts inventions book for kids covers key topics about the history of inventions in simple numbered facts. Every page is covered in fantastic illustrations and photographs that support a child's understanding of the text. - inventions through the ages such as fire in the Stone Age and smartphone in the modern Age
- progression in communication, transport, weapons and household appliances
- the technology of the future - The earliest steam engine was totally useless. Around 2000 years ago a Greek engineer invented a steam machine with a spinning metal ball. Unfortunately no one could think of any use for it.
- A half-century Chintamani, WAN Hu, tried to make a flying machine out of 47 rockets and two kites. His servants lit all the rockets at the same time, and WAN Hu disappeared forever!
- some stone Age people invented the first fridges! They buried spare food in pits dug in ground that was always frozen. - quiz question: were early refrigerators dangerous because (a) they blew up or (B) they leaked poison gas?
- Make a shadow clock using a garden cane stuck in a flat piece of ground. Measure the shadow every hour using a marker, from 9am to 4pm, and note which hour casts the shortest shadow
- rub your hands together really fast to feel how they become warmer. Rubbing things together is called Friction, and Friction causes heat