FAST and EASY to use! Advanced design. Small and ready to save you time on tests. Designed by a Professor of Organic Chemistry for students! Over 200 atoms and bonds Patented Resonating Pi Bond system lets you see and draw resonance structures! With this kit you can build and see: Stereochemistry Reaction Mechanisms Isomers Enantiomers Diasteriomers R and S configurations Makes learning Organic Chemistry easier. No big bulky parts that need a tool to separate. Small lightweight and will fit in your backpack Use on exams and for homework Website with instructions is free