Thames & Kosmos Happy Atoms Magnetic Molecular Modeling Set and Complete Set Build, scan, and identify molecules: the simplest way to learn about Atoms, bonding, and chemistry 50-Atom set includes these Atoms: 14 H, 1 he, 2 Li, 2 be, 6 C, 3 N, 6 O, 2 fl, 1 ne, 2 Na, 2 mg, 2 Si, 2 P, 2 su, 2 cl, and 1 AR Includes the free happy Atoms app (free download), scanning mat, quick start manual, and drawstring storage bag A digital and physical chemistry set, tested with teachers and students The app is available for Android, Kindle and iOS devices