The Thames & Kosmos Large Happy Atoms Experiment Set includes 50 magnetic atoms for hands-on learning in chemistry and physics. Published by Thames and Kosmos in 2016, this set is suitable for ages 10-17 and up, making it a great educational toy for older children and teenagers interested in science and nature. With a compact and lightweight design, this set is easy to store and transport, offering a fun and interactive way to explore the world of atoms and molecules.