They are bringing in a continuous changing stream of sensations and experiences.
What your eyes see is never really the same—shifting light and shadows, changing colors and hues.
Your nose brings in an always-changing smellscape from the moment you awaken—smells from your breakfast, the shower, the breeze on your way to school.
Sounds are always fluctuating as they enter your ears—loud, soft, high and low.
Tastes are continually arriving and disappearing from your tongue—sweet, sour, spicy, bland. Your skin is constantly bringing in sensations from your environment—clothes, weather and the embrace from a loved one.