Items needed:
- a camera
- a flashlight
Lesson
Show the camera to the audience.
Explain that when you feel the Holy Ghost before you are confirmed, it's influence can be felt in flashes, like this camera flash. When you are confirmed, you receive the Gift of the Holy Ghost. That gift is like a light that you can keep on all the time, like a flashlight -- a constant companion.
We can keep our "batteries" charged and keep the light of the Spirit in our life by attending church, serving in callings, obeying the commandments, and living worthily. (See D&C 121:45-46)