Blind Flowers

Another project we worked on in class was a blind flower drawing.  We were required to draw three flowers on a piece of drawing paper without looking, using a white crayon.  We then had to wet the paper down using water and a clean paintbrush.  After that we used warm and cool water colors to paint over the white crayon.  When we did this, the flowers appeared very clearly! 

An extension activity could be having students use it in math class.  They could set up problems using a peach crayon where the writing would be visible, but the answer would be in white crayon.  Once painted over, they would see if their answer matches the mystery answer!