Can’t you see it by Ron Gilbert.
One spectator is given a choice of an invisible ribbon red or yellow. They pass the chosen one to another spectator. The magician asks the second spectator to tie a number of knots in the chosen colour ribbon; this is then placed into an invisible matchbox. The matchbox is thrown to the magician who catches it visibly, when the matchbox is opened it contains the chosen colour ribbon and correct number of knots. No moves. Ideal for Cabaret, Close-up or kids.
Cost: £10.00
One spectator is given a choice of an invisible ribbon red or yellow. They pass the chosen one to another spectator. The magician asks the second spectator to tie a number of knots in the chosen colour ribbon; this is then placed into an invisible matchbox. The matchbox is thrown to the magician who catches it visibly, when the matchbox is opened it contains the chosen colour ribbon and correct number of knots. No moves. Ideal for Cabaret, Close-up or kids.
Cost: £10.00