Materials are expensive and take up valuable time to purchase, especially if you go through mutliple quick iterations. Often it is not needed to buy something new, but you can just use the scrap material of other projects, save money and be environmentally friendly while doing so. 🌳
Borrowing reusable parts from the available facilities listed below is also possible. Being limited in this aspect can even increase your creative, just in the spirit of tinkering.
There are some spots in the faculty where you can find scrap material. The PMB has containers where they collect spare wood, plastic metal parts, as well as workshops with containers in the basement which you are free to take.