This is a project assigned in Metal I course for final project. Instructor assigned us to design an aluminum cube shaped structure. I invented the connection of brass tubes with aluminum plates by blind rivets. Also used rivets to create interesting spikes in it. I designed the main structure to be the track for the plate, which is holding on the spikes, in order to let the spikes to move back and forth. It does not only added playfulness in my "cube", but also created an interaction between human and this piece.