I have a complete collection of Mattel LED handheld games (minus a couple rare duplicates that I sold off a couple years ago).

These little gems came out in the mid to late '70s. They would take a single 9V battery, and all gameplay was typically done with a small matrix of LED dots. All sound was done with a tiny built-in piezo driver. I was in love with these little guys the minute I first saw a neighbor kid with Auto Race! As a kid I only had "Football II", "Battlestar Galactica Space Alert", and "Armor Attack".

I also have several other handheld games from the era like Merlin, etc. I have about 30 or so Simon games that I plan on using to create a giant computerized lighting display for my gameroom. It's going to be an extremely impressive piece of work.

My favorite games were Space Alert, Master Blaster, and Super Simon.

Be sure to check out these links!
LEDhead - My free simulator for Mattel LED handheld games!
handheldmuseum.com - The Handheld Museum

I have a LOT more stuff to add here, so please consider this section under construction!

Pictures of some of the games from my collection

Vintage print advertisement for Bambino "Space Laser Attack"
I have one of these.

A series of images I rendered and modeled in 3D.