Om Books International Ultimate Brain Boosting Activity Book- Fun activities for kidsThis brilliantly illustrated book promises to keep you occupied for hours as you learn to master vocabulary, Maths, Science, Reasoning, and a lot more, through activities that make learning great fun!. Dimensions(cm): 20. 3 x 25. 4 x 4. 7 cm Recommended Age: 10 12 years Weight(g): 800 No. of Pages: 320 Disclaimer: The product is non returnable exchangeable. E mail us on contact@themomstore. in in case of Damages Defects Missing parts.