Explore convective penetration in stellar interiors through this 30-minute conference talk from the Transport in Stellar Interiors Conference at KITP. Delve into the context, theory, and simulations of this crucial process in stellar physics. Examine a simple model of radiative-convective boundaries, understand how convective overshoot causes entrainment, and investigate the three linked processes in convective boundary mixing. Gain insights into entrainment's role in building penetration zones and analyze toy models of fluxes in stellar convection and convective penetration. Discover the factors determining the size of convective penetration regions and observe the strong dependence on pressure in simulations. Learn how these 3D models translate to 1D stellar evolution codes like MESA. Conclude with a summary of current understanding, potential parameterization, and future research directions in convective penetration dynamics.