Om Books International 101 Inventions That Changed the WorldFrom the dark ages to the present day, humans have made a great amount of progress. Among all the great discoveries and inventions, there are many that have changed our lives forever. Whether it is the spoon or fork that we use to eat with or the Internet that completely revolutionized communication, each invention in this book signifies a step to words a newer, better world!. Dimensions(cm): 20. 3 x 25. 4 x 4. 7 cm Recommended Age: 8 12 years