Mike Senna built a life-sized WALL-E robot because that's what Mike Senna does.
A few years ago he built a working R2-D2 robot and then brought it to City of Hope, a pediatric cancer charity, because that's also what Mike Senna does.
Senna spent around 25 hours a week building WALL-E, and said it probably took him about 3,200 to 3,000 thousand hours altogether,
according to blastr.com.
Here's the video: