the iOS family pile (2012)
Notably absent is the poor lost iPhone 4. And the Apple TV (2nd gen) in the other room, strictly speaking.
Top to bottom...
iPads: iPad, iPad 2, iPad (3rd gen)
and smaller: iPhone (orig), iPhone 3G, iPhone 3GS, iPhone 4S, iPod touch (2nd gen)
Taken on March 22, 2012