Everyone is talking about the Playdate but I have a related Duke story about undergrad classes incorporating new hardware. My Digital Signal Processing course (ECE major) made a big deal about using these new things called iPods for class. Everyone got an iPod... for the semester. Even at Duke tuition prices you only got to borrow it. My recollection of the class work part was using a little piezo sensor that plugged into the microphone/headphone jack and recording your heart beat as a voice memo while doing a couple different activities. Maybe ten minutes for the semester. Then back at the computer doing a FFT to determine your heart rate. The lazy kids just got a copy of someone else's recording. This would have been 2004 or 2005. I think it was the third generation with clickwheel and monochrome screen.