Pretend to teach them, in the action of doing a trick. Like say, you take a card, put it in the middle of the deck, snap and its on top. And thats all, that is how you do it.
This would actually be the perfect set up to other tricks. You can move into a trick that feels sort of like a lesson. Such as A Shuffling Lesson by Paul Harris, oorrrrr Search and Destroy by Aaron Fisher even. it?
PLEASE DO NOT DO THIS!!! Pointers are some of the most underused utilities in card magic... teaching it to laypeople ruins everything.