Wow, this brings back memories (I’m a baby boomer). With a sharp little paring knife, cut the core out of an apple, but don’t cut through to the bottom. Take the pen inside out of a one piece pen to make the mouthpiece. Stick the shell of pen into the side of the apple, taking out any apple stuck in the pen. Poke a few tiny holes in the middle of a small piece of aluminum foil, and smooth that into the top part of apple (on top of pen poking in). Light up and enjoy!