My nephew and neighbor’s boy wanted to be Bumblebee and Optimus Prime. We looked at this website for ideas and came up with our own Transformers costume!
We began by finding cardboard boxes of all sizes. We collected star foam pieces and even plastic containers. We used silver tape that is used for dryer vents for the windows. We used the inserts of bicycle helmets, the star foam part, as their heads with straws, a part of a plastic containers.
Their transformer symbol was printed off of the internet and we traced it then went over with permanent marker. The arms and legs were made with capri sun boxes and the entire costume took about 4 cans of spray paint.
We sat in my garage constructing these things for about four weekends and had a blast doing them. The boys love their costumes.