This set of Leonardo Sticks will let your children play with color and create shapes, structures and fun using thin, long wood sticks. The ingenious constructions of Leonardo da Vinci inspired this set of 100 pieces (5 each of 20 different colors). Using them, one can create a dome and a bridge, which stand without glue or a cord and without a nail or a screw! These work best when the user has a quiet hand and some finesse to set it up. Instructions for dome and bridge are included. 100 colored sticks come in a wooden storage box. Made from lime wood colored using non-toxic water based color stain. The box has a plant based oil finish. Stick are 7 inches long by 3/4 inch wide. Made in Bosnia for Grimm's of Germany.