I love this activity and students too.Symmetry is when one shape becomes exactly like another if you flip, slide or turn it.

The simplest type of Symmetry is "Reflection" (or "Mirror") Symmetry, as shown in this picture of my dog Flame.

There is also Rotational Symmetry and Point Symmetry If points of a figure are equally positioned about a line, then we say the figure has reflection symmetry, or sometimes mirror symmetry. The line is called the reflection line, the mirror line, or the axis of symmetry. The axis of symmetry separates the figure into two parts, one of which is a mirror image of the other part.