DNA model. Colorful. For display or demonstration or as a manipulative. Enough materials for 30 students to assemble one nucleotide each. One nucleotide is assembled from a phosphate, deoxyribose sugar, and a nitrogen base. Then each student may combine their nucleotide with others to create a single strand and then a double-stranded piece of antiparallel DNA while learning about complementary base pairing rules and hydrogen bonds. Furthermore, the model may then be twisted to illustrate the double helix shape. Durable materials.