Stereoface

Howdy! I'm new to this forum ... I was wondering, i'm thinking of getting a Tamagotchi soon (say, a couple of days ) as i've wanted one for a fair while and finally found them in Toys R Us... but could anyone explain them to me? I think I get the jist (is that even how you spell that bloody word) of them, but I want to double check lol Cheers