When I was seven years old, my dad had one of those Mattel handheld football games, and I loved it. I bet if you grabbed a few Gen X-ers and told them to close their eyes, they'd all be able to identify that game by the click-click-click-chirrrrp! sound which is as linked to that game as "D'Oh!" is to Homer Simpson.
As a member of the video game generation, I've been through most of the console systems, watched the rise and fall of video arcades, and written extensively about some very memorable games. I am a sucker for anything that celebrates the games of our lives, and Donald Melanson's A Brief History of Handheld Videogames at Engadget is hawesome. He starts at the aforementioned (and pictured) Mattel Football, and works his way through the Atari Lynx, past all the incarnations of the Gameboy, to the PSP.
We've come a long way in the last 28 years, baby.