Since the sides of bassinets are generally low, safety must be a priority. (newkidscenter.com)
Also, when your baby is sleeping and his / her head / feet keep hitting the ends / sides of the bassinet it's time to switch it up. (momandbabylab.com)
Baby is a couple inches lower than the bed, and there's a short railing on the side of the bassinet that adjoins the bed. (momandbabylab.com)