spring from a pen
Step 3: Some paper
Fold by the half, and then by the half and half...until you get something like the picture
Cut a little peace of eraser and paste it with a glue gun to the cassette like the picture, you can add some tape.
Step 4: Add the springs
Step 5: Find your lantern
Then cut the usb green and white cables
Finally conect the usb cable ground to the leds ground and the usb voltage to the resistor.