Baby's Biscuit is a type of RUSK, which is a hard, dry biscuit or a twice-baked bread. It is usually made from flour, yeast, and sugar, and is often served as a snack or with tea. Baby's Biscuit is a popular snack in many countries, especially in India, where it is known as 'Nankhatai'. It is also popular in the Middle East, where it is known as 'Kahk'. Baby's Biscuit is a great snack for babies and toddlers, as it is easy to chew and digest.