Slideshow: Robots Rumble at Annual Expo

Following a curved line may not sound like much to a robo-neophyte, but to fans and programmers in-the-know, it's no simple bot trick.

This Lego-bot scoots around with the help of a 17-year-old NASA intern who explained the subroutines and algorithms he wrote to command it.

The Summer Robot Games featured to-the-death combat between minibots with names like Shazbot and Stumpy who wreaked havoc with saw blades and other bot weaponry.

Microbots spent most of the afternoon attracting -- and avoiding -- the micro hands of spectator kids at the Robotics Society of America's Summer Robot Games & Expo.

Sony's Aibo pets come in various breeds, colors and skill levels now. One even finds its own way to its recharger when its batteries are low.

For a mere $75,000 you, too, can own the HOAP-1. With the right programmer it can play soccer, learn martial arts and more.

With red horns, nose ring, spiked dog collar and feather beard, this robot, Ziggy, didn't move much, but it was a hit with passersby nonetheless.