ZooBooKoo Add Subtract Cube Books, an innovative and intelligent educational toy for young kids. Its a bundle of knowledge, figures and facts at your finger tips. We bet, even the elders will find it difficult to keep it down ones they have started reading the ZooBooKoo Add Subtract Cube Books. ZooBooKoo Add Subtract Cube Books supports National Numeracy Strategy * 5 - 8 years * Learn to use a number line and number square * Doubles and near doubles * 'What makes 10?' and 'What makes 20?' * Excellent fun testing There are six pages on one side full of education and then turn them inside out and you have another six pages of education. The cube books make a perfect education toy or gifts. You have the option to select from a variety of ZooBooKoo Add Subtract Cube Books.