Musicarta Beat and Rhythm, Snake Dance series
Variation Three is the same as Variation Two, but the first left-hand fifth in a bar is broken up bottom note-top note.
In the right-hand-under second half, the broken fifth alternates between bottom note-top note and top note-bottom note. Practising this tricky alternation in the normal, uncrossed-hands position first would be a good idea.
Little variations like this make music sound more sophisticated.
Syncopation and Anticipation