This week's favourite brick(s) of the week are a very specialist group of pieces. The Forma sets are geared towards the adult market and use new fabric pieces to create the models, but these fabrics or skins have been used ingeniously by Aaron Newman for many interesting applications.
They come in a range of colours and shapes, meaning Aaron could get very creative with their uses, such as for the wings of a spectacular bird, a wing suit and a hang glider. Make sure to check out Aaron's Flickr here for all the uses: https://www.flickr.com/photos/nujumetru/
Unfortunately, these pieces are very hard to get your hands on; they're not really even listed on Bricklink, as to my knowledge you could only purchase the sets via a crowdfunding site: https://www.indiegogo.com/projects/lego-forma-add-a-splash-of-creativity-to-your-day#/