Everything around us is made up of different elements. The air has Oxygen (O) and Nitrogen (N). Plants and people have lots of Carbon (C). Helium (He) is in balloons, Hydrogen (H) is in water. Play until you discover which particle (or particles) determines the name of the element you build. What did you discover?
"D Pizotons E 1 ""Carbon"" determined by protons. 2 ""Nitrogen"" (element determined by protons )