We suggest 5 years as an ideal age to begin piano lessons. The reason why we suggest that we begin with age 5 is because, this it the age when children start focusing better and are able to sit through a 30-minute lesson.
However, there are always exceptions. There are children who mature early and have better attention span as early as 4 years of age. Obviously they have to be able to read by this age as all our instructors use a standard piano method book.