You can teach the piano to children from age 3 onwards using the Dogs and Birds method.

It is not necessary to know the alphabet.

Animals symbolize the notes: Dog for D, Bird for B, and Cat for C etc.

I would, without hesitation, recommend "Dogs and Birds" as a most wonderful introduction for our youngest children in the commencement of their musical journey at the piano. Emily Jeffrey – Royal College of Music, Purcell School, and Royal Holloway University of London

A comprehensive step-by-step course specifically designed to suit the needs of all children beginning the piano. Includes: characters and illustrations * writing exercises * sight reading drills * review work * accompaniments * and more. Contains worksheets, reading-aloud exercises and accompaniments for teacher or parent.

Piano Adventures® is the teaching method of choice at leading university programs and music studios around the world. This student-centered approach uses analysis, creativity, and expression to develop a “musical mind and heart.” The delightful, pianistic pieces and creative theory pages, combined with an outstanding technical approach encourage practice and progress—with adventure!