1D gases with point contact interactions are integrable many-body systems, which means that they have many extra conserved quantities, beyond the usual few (energy, momentum, etc.). I will explain integrability in more detail and then show how we make bundles of 1D Bose gases in the lab, the various ways we excite them out of equilibrium, and how we use them as model systems for studying quantum dynamics. Perhaps surprisingly, we achieve insights that can be applied to understanding the early time dynamics of relativistic heavy ion collisions.