MODEL-IT! Workshop 3 site model 1:200

I did the site model using the white cardboard as the contour and I also did the fisher house in white cardboard and which i realized that it would be better if i use a different material to present the house cause it is a different material, so i changed by using balsa wood for the house. I found that it is quite hard to use white cardboard for the contour because it is so hard to cut and i can't use sand paper to modify the edges, therefore i didn't choose this material for my next model~