Use Up, Down and Strange Quarks and Anti-Quarks to make 31 different Hadrons. There are Electric Charge (Q) and Strangeness (S) meters.The Colour Charges of the Strong Force can be given to the quarks, and gluons set off to exchange colour between them.Mesons, Baryons and Anti-Baryons are arranged in groups ("Nonet" and "Decuplets").HadronBuilder is a simplification of the Quark Model, a "Toy" version.It replaces an older Air based version