The winner: Camera obscura
by Nguyen Ngoc Gia Nghi (Anna N.), Tang Thanh Vy (Mickey) and Vuong Kim Gia Han (Anna V.) .
And more pictures of all projects:
Just for reference: this was our rubric 2018 for the inhouse Science & STEM fair. I don't like border- and fontsize. But that's just me ;) Rubric for Design Technology follows.