Mimosa pudica aka sensitive plant or shameplant is a very unique plant, that will physically move, and close its leaves up when touched, disturbed, brushed against, etc. The movement is literally fast enough that you can touch the plant, and watch it shrink away from you in a couple of seconds! These plants have nice, fuzzy purple flowers, that you can harvest seeds from and grow more very easily.
One of the most unusual plants there is, in our opinion!
They enjoy bright light to full sun, and kept moist. Feed during the growing season, and watch out for their little thorns!