Unscrew the lens assembly from both "eyes" of the goggles.
Remove the dark green lenses. (Leave the clear plastic lenses in place.)
Make red and blue filters for the goggles. Simply trace the shape of the lenses onto gel sheets and cut them out with a utility knife. Make two blue filters and two red filters.
Insert a blue filter and a red filter into each eyepiece. If needed, attach with a dab of glue.
Solder a row of four LEDs together in a series and attach this row to the right side of the goggles with silicone glue. Do the same for the left side.
Use a three-volt battery to complete the circuit and light up the LED lights. Connect one wire to each side of the battery and secure each with a small piece of duct tape. Then attach the battery to the goggles with silicone glue. Do this for both right and left "eyes" of the goggles. If the lights don't come on once wired to the battery, reverse the wires and try again.
Test your goggles. Walk around in a dark room or outside at night. The human eye cannot detect the infrared light the LEDs emit, so you will be somewhat "invisible." To turn off the goggles, peel back the duct tape from top side of the battery and disconnect the wire.