FREE: Broken robotics!

My 13 year old son is taking an online robotics class and is needing something robotic to take apart, analyze and (hopefully) fix or at least use for parts. If you have an old robotic and would like to donate it to science, we'd love to take it off your hands. Such as a: - drone that no longer flies - robot vacuum cleaner that has bit the dust :) - robotic kids toys that used to sing, dance, move but are now no fun - self driving car (ha ha...) Any makes or models will be appreciated! We are looking for something that has a sensor, (previously) moving parts, a control system, and a power source, if you have a different type of robotic. Thanks!