Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
DIY Pencil Kit for sand from everywhere.
To put sand and pencil lead in the tube, close the cap and wait for one day to let "Bacillus pasteurii" biochemical process go on.This way to produce pencil is eco-friendly ; besides, thousands of trees can be saved from being cut down.