Well, one thing I find best when putting together a presentation for a scary or supernatural themed show is look at local legends and created a presentation around it. Like I live in San Antonio and we have the legend of the haunted train tracks. Here is a potential presentation that could be based around the story.
The performer produces a small toy school bus and a picture of a set of train tracks. Black and white, aged, at the bottom of the picture's white frame scribbled in cursive, "In memory of the souls lost during the year..." The picture is set down on the table, as well as the bus. While narrating the story, the performer animates the bus using his fingers.
"Have you heard about the train track massacre? No? Well then you are in for a story..." The performer then proceeds to show the picture around to the audience if he hasn't done so prior, "We're playing guess the picture, can you tell me what is in this picture? Correct! Train tracks, but not only train tracks. Oh ho ho no, these are the train tracks that a most horrible, tragic incident transpired on."
"A few years ago, well possibly more then that excuse me mam what is your age? Fifty two? Hmm that sounds about right. Fifty two years ago, a bus full of eager little kiddies ready for a night of trick or treating, stalled while crossing some train tracks. The bus centered precariously between the two metal tracks." At this point the performer makes the bus stall on the picture, right over the train tracks.
"At first very little panic. The kids remained seated while the bus driver attempted to fix the stalled vehicle. It was the bus's misfortune to have stalled on a blind corner. A whistle sounded in the distance. The thunderous sound of metal wheels that glided and squealed over the metal tracks began to grow louder. Panic swept through the bus. Before anyone had a chance to get out of the school bus...the train barreled through it killing everyone, some instantly while others...well, everyone died use your imagination. This event was so horrific that the spirits still hang around the train tracks, their final resting place. It is said that if you park your car over these very same train tracks in the picture, and then put it in neutral. The souls of the children will begin to push your car off of the train tracks, uphill. Defying gravity! Surely it must be supernatural. I wonder though..."
The performer pauses and looks down at the stopped toy bus on the train tracks. Soon after that the bus slowly begins to creep across the picture seemingly untouched.
"The energy of the lost souls are truly strong."
The picture is handed out to the audience member who gave their age. If they bother to inspect the picture further, they'll find that their birth year is scrawled across the back of the portrait. A strange coincidence indeed.