Clay time (get it?....Like play time)

I remember my mom used to make these cool clay necklaces when we were younger.  I also remember she wouldn't let us use a lot of the clay to play with, now I know why.  Max usually just rolls most of the clay into a large colorful ball.  The other boys are a little more careful.  They made some pretty cool stuff, plus it entertained them for a good 2 hours.