The most requested song by ALL my students has consistently been Linus and Lucy by Vince Guaraldi. Many years ago I put together an easy version for my students that uses only three notes. Even a brand-new, beginner can play it and have fun making good music.
This year I decided to put together my first ever Youtube Tutorial designed just for kids. In the video I teach them everything they need to know and I play the song so they can play along with me. Also, here is a FREE arrangement to help encourage note reading.