Remember that sound when you use to scratch the chalkboard with your fingernails? Well, get ready to send shivers up their spines again with these slates. Two blank slates are shown and placed aside. A card with a selected and remembered. All the spectator does is whisper the name of their card at the slates. When the slates are looked at again, the name of the card is now eerily written down on the boards! talk about freaky!