OLO is a portable 3D printer hat you attach to your phone. This portable 3D printer is only 6.8 x 4.5 x 5.8 inches. To use this small printer all you have to do is open up the app on your phone, pick the model you want to print, place OLO over your phone, and then pour the recommended resin in the device. The app makes the screen on your phone light up with the pattern that is specific to your model.
http://www.coolthings.com/olo-smartphone-3d-printer/
This is related to engineering because you have to engineer this device so the quality and the printer actually work. You also have to design an app that works with OLO.
https://www.youtube.com/watch?time_continue=112&v=lRU6h46eAmg
