Colors:
The Meaning of Colors
12 Colors and Their Meanings
Understanding the Meaning of Color in
Color Psychology
Colors and Symbolism
More Color Meanings
Color Psychology  
Incredible Art

Shapes:
Geometric Shapes
Spiritual Meaning of Shapes

Graphic Representations:
Character Map
Character Mandala
Defining the Mandala
Shapes Explained
Interested in the Arithmatic of Space  
or Astronomy?
Mandala
Rubric for the Mandala (this is how I
will grade you; this is what you need to
do!)
What they mean

Mandalas in Nature

Science and Mandalas

The Circle Seen Through Ages
Counter
Nature Mandalas
How to Create a Mandala

Mandalas elsewhere:
Women Are Heroes Too