Senna had built a life-sized robot before, a working R2-D2 which he began taking to events for a pediatric cancer charity called "City of Hope." And with the emergence of WALL-E, the robot with "more emotion," Senna started work on WALL-E.
It was said that building WALL-E was tougher than building R2-D2 and that Senna had to watch the animation WALL-E over and over to get all WALL-E's movement right. Senna stated that he worked on WALL-E at least 25 hours a week. All in all it took him between 3,200 to 3,800 hours to finish the robot. Senna also has a job and he paid for all the materials he used by himself.
With WALL-E now working, Senna is able to take him to show off with the kids:
Check out Senna's blog for more photos.