The workshop with Christine Otto Kanstinger was based on the understanding of tension and compression by modeling physical models starting building bridges with foam latter with papper clips and glue and ending it with an structure designed in tension but also working with compression when we turned around. We started the workshop with a site visit to Sagrada Familia in order to understand the different forces that acts in real structures and also to see how by experimenting with physical models can we understand better what we do on a computer model based, all of this was explained by the experts working in the design office and the work site. The experience gained during the workshop showed us that sometimes we need to get out of the computer based modeling to test things like materials, shapes, grids, and how it works in general.