Equilibrium is a sculpture hanging from the ceiling in the 160 entrance of STEM. There are ultrasonic sensors along the staircase which make lights turn on within the sculpture according to traffic in the stairs.
Surface tension is a moving wall of triangular pieces under the main staircase near the Makerspace. There is an Xbox kinect at the top of the wall to track people's movement and replicate it with motion of the panels with a raspberry pi.
Your goal is to add to one of these 2 installations in any way that you think would enhance it and by adding another element of interactivity.
The Makerspace Challenge 2018 generated many other ideas that you can explore here: https://makerepo.com/category/gng1103%2Fgng1503.