Not having found a piano teacher for my 5 year old daughter I was forced to fall back on various methods. This one is my favorite. Very progressive and enjoyable (the child colors the book, appropriating there) this method served its purpose. With 15 to 20 minutes of practice, 2 times a week, progress is at the appointment. The acquisition of the theory is naturally and smoothly approach the keyboard.
I also suggest "the piano method of 4-7 years" where the left hand quickly (too) a contribution. As well as "the piano arc en ciel" more playful, colorful, pleasant but less teaching, especially in relation to the acquisition of key FA.