This kit allows easy construction of three dimensional model of DNA molecule. Emphasizing the base pair sequence and functions of DNA, the sturdy, colorful bases shape together in the correct sequence, and the pairs attach to a center rod representing hydrogen bonds. Two flexible strands signifying alternating pentose and phosphate units attach to the end of each pair, forming the double helix. Once complete the, the model can be rotated on its sturdy base. Includes enough materials to construct one model.