"ஐ" (I) is the colourful and beautifully illustrated first interactive Tamil Board book about the 5 landforms - Kurinji, Mullai, Marudham, Neithal and Palai of the sangam era. This book focuses on imparting the sangam knowledge on how landforms influence people choose to live, the foods they can grow, the flora and the fauna of that area, water resources that supports the lifeform, region’s cultural history, societal development and architectural choices. It predominantly focuses on imparting Tamil language and its culture and heritage playfully through the interactive mechanisms (slider, lift the flap and telephone dial) for the early age group 6 months to 10 years. This book is referenced from the Tholkappiyam and silapathigaram