Wanna learn to play piano? Try these chord tutorials! :O)

My eldest son taught himself to play piano, and 6 years on he can play any classical piece and even compose symphonies using a neato little program that lets you write for each instrument and then puts it together. I woulda guess he practiced at least 2 hours per day (on his own - I never got involved or interfered in any way - this was HIS thing).
It occurred to me that my youngest two oughta give the piano a go now too, even though I recognize that not everyone will develop a passion for it the way the 18 year old did. At least they'll be able to pick their way through simple songs though. Youtube has tons of simple piano lessons for playing songs - as opposed to learning music theory and learning in the classical manner, which could come later if the student was that interested. So - FUN! I am going to try it too. Here's one I found that is nice and easy - this week, 4 chords over and over 'til we can play them blindfolded. Next week the same....
Tutorial Number One, The Basics...

Learning to play chords on the piano will take far less time than learning to read music. It is easier to improvise using chords on piano than it would be to try to use individual notes while you sing your songs.