FLORACRAFT-DNA Kit. DNA is essentially a very large molecule that contains the blueprints for life. Building this unpainted DNA model will help you understand the basic structure of this amazing molecule! Kit includes twenty 1in Styrofoam balls, twenty 1-1/2in Styrofoam balls, ten 2-1/2in rods, ten 2in rods, ten 3in chenille stems two 45in chenille stems, 14-1/2in reinforcement wire 4X5in display stand and complete instructions. Certified Lead Free. Recommended for children ages 14 and up. Made in USA.