For more than two years, Segway owners have been playing polo on their gyro-stabilized, two-wheel transporters. Here, players take each other on at the Maker Faire.

The Crucible, a Berkeley, Calif.-based fire-and-metal arts organization, brought its Educational Response Vehicle to the Maker Faire. The “fire truck” repeatedly spewed giant fireballs.

Lindsay Lawlor brought his robotic giraffe, the Rave ‘Raff, to the Maker Faire. Lawlor is pointing to the Rave ‘Raff and wearing the giraffe-theme shirt.

The Rave ‘Raff comes complete with a sound system and a ton of LED effects. Here, the giraffe kneels down low for Lawlor to show off.

One of the biggest attractions for kids at the Maker Faire is a room filled with computers brought especially for ripping apart.

Far in the back of the Maker Fair’s main hall, attendees could find two robots programmed to fence.

A family works at Thomas Zimmerman’s “Z’s Stop-Frame Animation” table.

A giant 8 ball floated over the entrance to the Maker Faire.

Retired computer engineer Tim Robinson shows off his “Difference Engine,” a mechanical calculator based on Charles Babbidge’s 1848 design.

One of the most popular demonstrations at Maker Faire taught people how to make highly effective paper airplanes. Here, a boy prepares to throw two creations at the Maker Faire.

A little girl prepares to throw her paper airplane.

Tom Noddy shows how two bubbles, one filled with smoke, can merge.

Perhaps the best-attended presentation at Maker Faire is Tom Noddy’s exhibition of how to make incredible soap bubbles.