Thames & Kosmos Happy Atoms Introductory Set (17 Atoms). Chemistry is the science of materials, their properties, and how they react with each other. All materials are made of atoms. Why do some atoms combine with each other while other atoms do not? Because atoms just want to be happy! Of course, atoms dont really have feelings. But they do have observable behaviors. And atoms tend to be more stable, or "happy," when they have certain numbers of electrons whizzing around their cores. Where do they find extra electrons if they need more to be happy? From other atoms that have too many electrons, of course! When atoms share or exchange electrons to be happy, they stick together. Happy atoms form molecules! With this revolutionary approach to teaching chemistry, you can make your own happy atoms! This physical and digital system lets you discover the world of molecules in an intuitive, hands-on way. Using a set of 17 atom models representing 6 different elements, you can assemble your own molecular models. The atoms connect easily with magnets: metal tips on the ends of rubbery arms, which represent free electrons, snap onto magnetic bonding sites on the atom spheres, which represent empty spots for electrons in the atoms outermost electron shell. With the Happy Atoms Introductory Set, you can snap together hundreds of different molecules. Because the atoms already have the correct number of free electrons and empty bonding sites, it is difficult to build a molecule that doesn't actually exist. Happy Atoms function like the building blocks of the universe! The digital component takes this molecular modeling system to the next level. Using the Happy Atoms app and the camera on your tablet or smartphone running iOS or Android, you can scan molecules you build. The app then uses state-of-the-art image recognition technology to identify the molecules. After a molecule is discovered, the app presents information about it, including its composition, usage, properties, hazards, formula, and structure.