Super 8 Wiki

It's a goof: the cubes are 2 different shapes in the film.

In the beginning when Joe first picks one up, it's a perfect cube with little bumps.

Later (when he's in the bath, and when it starts vibrating) it's not a cube any more.

If it was intentional (part of the story) I would think SOMEONE would have mentioned it... 20:45, November 12, 2012 (UTC)