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Ask your audience to inspect four cubes, all of which have a special feature:
The tops and bottoms are marked with a coloured dot while the sides,
of each cube are numbered 1, 2, 3 and 4.
Moreover, you show the audience an oblong wooden box open at one side, which is attractively decorated in black and red.
Then you put the cubes, in a random assortment of numbers, into the box (e.g. 1-4-3-2) and cover everything with a pretty cloth.
When the cloth is removed, the audience can see the magic:
The cubes have magically turned and are now in the right order 1, 2, 3, 4.
Use Colored Dots on Cubes instead of numbers.