In the mail? Nothing. Instead I picked up a Tamagotchi Friends at a local store. Pretty awesome. The last time I bought a tamagotchi in person was back in 2010, when I suddenly had the urge to buy a tamagotchi and rode on the subway for 50 minutes to get to a store in hopes they would sell one! (I bought a V5, my first real tamagotchi.)
It's the jewel blue one and holy moly! People were right when they said it's difficult to see, well, anything. (Didn't even see that there were two poops on the screen already, oops...)