We have developed an energy harvesting apparatus using the drinking bird for an experimental teaching material. Some of the pendulum motion energy of the drinking bird is converted into the　electrical energy by electromagnetic induction. It is possible to confirm the small LED flashing and the operation of galvanometer. We conducted a lesson of energy harvesting to college students and carried out the demonstrative experiments using this apparatus. We clarified the teaching effects through the mini tests and surveys to confirm the comprehension of the students.