A double predictions is a trick using a very clever method. You can 100% predict the spectator's choices, above all, you can double the effect twice if spectators change their mind.
No electrical devices, pre-show, stooges, magnet, string required. Spectator can freely pick any number from one to six. Multi-out method is not applicable. Spectator chooses a number, you turn over the piece of paper.
Additional supplies may need to be purchased and basic gimmick manufacturing skills are a must.