I am a teacher at http://www.keefetech.org/

I started using acrylic and oil paints in the last few years. Check out Caroline Roberts post about pigment toxicity. http://carolineroberts.blogspot.com/2009/01/toxicity-of-pigments.html

Gregor Gaida sculpture

http://weandthecolor.com/freaky-art-sculptures-by-gregor-gaida/11913