One of the frontiers in modern cosmology is understanding the end of cosmic dark ages, when the first stars, supernovae, and galaxies transformed the simple early Universe into a state of ever-increasing complexity.  I will talk about the possible physics behind the formation of these first luminous objects by presenting the results from our simulations.  I will also discuss the possible observational signatures of the cosmic dawn that will be the prime targets for the future telescopes such as the James Webb Space Telescope (JWST).