How to Make your own subset?

1.       Take a piece of paper, write a very big A on it covering the entire space.

2.       Tear this paper into at least 10 pieces.

3.       Write B and C on the table near two diagonally opposite corners.

4.       Divide the pieces of the paper in two parts; collect one near B and another near C.

5.       That’s it! You have your two subsets B and C of A.

6.       What? You expected more steps? Ok, then you can go ahead and can even divide and tear pieces near B and C further and make more collections of pieces near the markings D, E, F,etc…

7.       But remember, finally you have to clean your table!

Few formalized representations (this means the serious stuff, if you have not got it yet):

B and C are subsets of A is represented by B C A, C C A

Φ is subset of all the sets