Swan Lake for Piano
Tchaikovsky's evocative ballet music works well for early beginners as well as late elementary/early intermediate piano students.
My younger students were more captivated by this piece once I added a story to it about the swans.
There are also beginner arrangements that leave the lyrics out.
The most difficult arrangement (& most beautiful):
Page two of a similar arrangement, but with more frequent solid left hand chords:
This is a lovely recital piece.
It makes an enchanting duet as well:
The secondo may LOOK difficult, but it is just parallel-hands chord inversions!