MentalGum:
Explain that there is only one piece of gum left inside the pack and have a spectator select a row and a compartment. Display that the last piece is sealed inside the exact location they just chose.
Torn & Fuzed:
Show a silver pack of gum and a blue piece of foil from another pack. Visually make the blue piece fuse onto the silver foil, leaving it completely examineable and hand it out as an impossible souvenir
Marked:
You mark one compartment of the gum pack as your prediction and have a spectator draw an X onto any compartment on the other side and it matches with your prediction.
Push Through:
Display a piece of gum inside one compartment. Have a spectator cup his hands underneath and visually push the gum through the compartment without any holes or slits.
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* applies to deliveries within Germany, delivery times for other countries can be found on the shipping information button