Teachers, why limit your lab activities by using only standard molecular model kits? Now, you can design your own activity kits. This complete assortment of color coded atoms and bonds allow the flexibility to create individualized models and molecules. Just like the standard model kits, atoms are modeled in polypropylene with flexible vinyl connectors to represent the bond "linkages." Double and triple bonds are easily constructed. The models are easy to assemble, well constructed and come apart only when you want them to come apart. This Lab-Aid contains an extensive assortment of 480 atoms plus 300 bonds.