Someone once asked "Why do we need math anyway?"
I assumed it was a cry of frustration, a rhetorical question, but I answered anyway:
We need math because it's human nature to observe, organize, categorize, sort, compare, contrast, combine, separate, and otherwise monkey around with everything we come in contact with. Math is the language with which we communicate such things.
Some things I've posted in various forums:
Is math all memorization and drill?
Playing With Math
Street Corner Math
Unschooling Math: What is Real Math?
Playing With Concepts
Math Without Worksheets?
Links to cool math stuff: