For developing self-control and relaxation, have the children practice
silence. Have them relax and show them that the movement of a foot or
a hand makes a slight noise. Have them listen to their breathing, and
then breathe just as quietly as they can. Drop a pin and have those
who heard it put up their hands. Let them become perfectly quiet again
and drop several pins for them to count. See who is the most accurate.
In all your instructions to them only whisper. Do not allow them to
talk or whisper at all during this exercise. As you use it prolong
the periods of silence and attention to one sound or idea. This is a
wonderful exercise for the development of the power of concentration
and should be played often.