I do not breathe, but I run and jump.
I do not eat, but I swim and stretch.
I do not drink, but I sleep and stand.
I do not think, but I grow and play.
I do not see, but you see me every day.
What am I?
I have two objects that look and feel exactly the same, however one is heavier than the other. How can you tell which one is the heavier one without using a scale?