According to most experts in early childhood education, it is not developmentally appropriate for children under the age of three to be formally taught to read and write. At this stage, children are still in the early stages of language development and are typically focused on acquiring basic communication skills, such as speaking and listening.
While it is important to expose young children to books and language-rich environments, research suggests that play-based learning and exploration should be the primary focus of early childhood education. Young children learn best through hands-on experiences that engage all of their senses, such as playing with blocks, puzzles, and other manipulatives.
That being said, every child is unique, and some children may show an interest in letters and writing at an early age. In these cases, it may be appropriate to support their interest through informal activities such as drawing or tracing letters, without imposing formal academic expectations on them.