I built a giant robot costume for Maker Faire Atlanta 2015. In the video below I'm using the costume on Vermont Ave in Asheville, NC during Halloween. My wife Anne is walking beside me and she's playing the part of the wacky inventor. Anne's holding a shoe box prop made to look like it's a robot controller (she fooled a lot of people with that!).
The robot is built upon a two wheeled human powered vehicle that I remember from my childhood which was called a "Krazy Kar". The original Krazy Kar was built out of plastic similar to the "Big Wheel" toy. My vehicle was built out of 2x4 boards and wheels from my garden cart.
Here are a few more photos of my robot in action during halloween.