A drop of water
There are over a hundred-billion stars in our galaxy and 50 billion galaxies in the observable universe. If each galaxy contains a hundred-billion stars, then our known universe contains five "sextillion" (5,000,000,000,000,000,000,000) stars.
What if I told you that this was just a drop in the bucket compared to how much water lives in our world.
There are 120 times more water molecules (6 hundred sextillion) in one cubic inch of water than there are stars in the observable universe!!!
https://www.grc.nasa.gov/www/k-12/Numbers/Math/Mathematical_Thinking/stars_and_drops.htm