This book of 64 pages is pubished by Children's Book Trust (CBT). It deals with 4 inventions viz. Wheel, Steam Engine, Microscope & Printing Press. It has nice & witty illustrations that make reading it a fun-filled experience for children at whom it is aimed! I have previously uploaded 2 other books on inventions here:
1. Inventions & Discoveries (PDF)(http://www.ahashare.com/torrents-details.php?id=19666)
2. Inventions That Shaped The World (PDF)(http://www.ahashare.com/torrents-details.php?id=19903) Do read them too if interested.
You can also visit the official CBT website at http://www.childrensbooktrust.com/Pictures and details http://www.AhaShare.com/torrents-details.php?id=20896
More quality torrents at http://www.ahashare.com
Emulesearch at emuleday.com