During June–August, our high school interns, Siddarth, Woojin, and Neha conducted summer research on 2D van der Waals materials in Yu Lab. They exfoliated 2D layers from bulk crystals, developed MATLAB code to identify individual atomic layers, and used our transfer system to construct microscale van der Waals heterostructures. Their samples were characterized with photoluminescence spectroscopy and made into electrochemical biosensors. It was an exciting summer of adventure and creativity!