China Magic trick Golden Dream Lock Mentalism Magic Street Magic trick Kids Magic You can do either of the following: 1. Ask spectator to name ANY 4 digit number 2. Project the 4 digit number to their mind and have the spectator name it. 3. Have 4 different people name a single number each to form the 4 digit number. Whatever numbers the spectators have chosen, they put the numbers and open the lock with their own hands!