Peperomia prostrata also known as String of Turtles, Jade Necklace, Magic Marmer and Radiator Plant.  You will fall in love with his little button-like foliage and interlace pattern. He is a great little indoor plant for beginners, mostly because he prefers a bit of neglect and is somewhat forgiving. But when moving this little dude, take care he can be a delicate button so it's a good idea to keep him this nursery grow pot as long as you can.