i come with new attractive ,easy and smart power generation idea which is useful for your smart project and give new way of creation .
piezo electric power generation which is fully depend on applying pressure on piezo transducer,
Step 1: Collect Wooden Plywood As U Want to Make in Your Size
cut as per images .
Step 2: Buy Piezo Electric Buzzer at 20 Rs Per Pic and Modify As Image and Get Piezo Transducer