In this activity, learners explore atoms as the smallest building blocks of matter. With adult help, learners start by dividing play dough in half, over and over again. Then they use a notebook (a few small squares of paper with 2 staples along one edge) and start folding the pages in half. Magnets and play dough are used to model the proton and electron cloud of an atom, and two play dough hydrogen atoms are "bonded" together to form a molecule. Intermolecular bonds between water molecules in different phases, physical changes, and chemical changes in the kitchen are also introduced. This activity was designed as a kit that could be checked out of the library, but the kit is not required.