From birth to three years old. This is a wonderful combination book for your boy. From the ABCs to shades, and from first vocabulary to human body parts, there's a lot to remember. This book covers a wide range of topics for toddlers in one volume. This vivid, colourful book with a simple design and toddler-friendly style will delight babies. This book is a wonderful way to help young children improve their sensory skills while having fun. This is an absolute must-have for any toddler.