by Mr Grumpy » Oct 20th, '11, 12:11
I usually do that with props of course. For some reason, with this, I wanted to do the opposite. It's the devil in me...
Have them take it apart and put it together again, do the switch while they pick a card, perform the effect with their signed card, switch back during the off-beat, then get them to "have a go" with "the two cards that came with it".
I keep "the unit" in a cheesy-looking faux leather wallet lined with red nylon; the wallet also holds two playing cards, one red backed and one blue backed.
"You're supposed to do it with these two cards that came with it. Have a go with these. Insert one into the unit... That's it... Now wave the unit over the other card... Has it changed? Hmm... It doesn't seem to be working..."
Spec plays with it for a bit, then looks up at me and sees from my mischievous grin that I'm just winding them up, and that it really is just two pieces of perspex stuck together.
(I wouldn't wind them up if I didn't think they'd enjoy it, of course... Some people don't appreciate that sort of thing!)