Grains of Sand

Got a great idea from the book, Sacred Balance by Dr. D. Suzuki.
He is talking about th ebook, Earth in the Balance, by U.S. Vice president Al Gore. Apparently the books talks about something called critical point, and here is how it is described:

"... described the results of research on the physical properties of growing sandpiles. When grains of sand are added to a pile one at a time, the pile grows until it reaches a critical point at which the addition of one more grain of sand causes avalances, slides, and massive changes. It is an apt metaphor for the way individuals can create suddent shifts in popular understanding and social action."

This is a great visual, don't you think?
Imagine demonstrating it or even just describing it. Think of all the key learning points you could make.

Here are few I can think of:

-one person can make a difference
-many together can move mountains
-one more negative comment can cause the erosion of self esteem
-one last piece of pie tips the scales

So, well, make out of it what you wish. It works for me.