concept:
- plant talks when people step close
- talks when it needs water or something else
- sound / voices / music
- movement (e.g. wheels, moving leaves)
- harmony or disharmony (happiness/discomfort) expressed by sounds, factors: soil dryness, too much sound (like stressed zoo animal) -> additional light spectrum to show happiness
- moss floor?
- plant shakes and shivers when discomforted, moves gently when it feels comfortable