We develop a setup to quantify in real time the ability of 3D-printed structures to protect the brainlike soft gel. In a typical measurement, we load a 3D-printed structure on top of the soft gel, below which is placed a piezoelectric force sensor, and drop a stainless-steel ball with 12.7 mm in diameter (8.35 gram) from 580 mm height. Simultaneously, a high-speed camera is used to monitor the whole impact process, as illustrated in Figure . The high-speed camera takes images at 826 frames per second (fps), which is sufficient for monitoring the deformation of the brain-like soft gel in real time. In parallel, the piezoelectric sensor proportionally converts the applied force to output voltage, which is recorded at a relatively high rate of 10,000/sec. A custom MATLAB program initiates and synchronizes the dropping off the ball and beginning data collection from the high-speed camera and piezoelectric sensor.