These six extra thick, transparent plastic color paddles are great for experimenting in color theory in either art or science class without the mess of paints. Each paddle measures 5-3/4" x 2-3/4" (15cm x 7cm). Guide includes cross-curricular activities for both art and/or science. The paddles include the 3 primary colors of red, blue and yellow and 3 secondary colors of green, orange and violet.