> It sensory deprives the baby. Infants can't even significantly move their necks, let alone see color for several months. Once they can roll over competently

> It sensory deprives the baby. Infants can't even significantly move their necks, let alone see color for several months. Once they can roll over competently without the risk of SIDS, that's when you move them from the bassinet to a crib. The whole point of the bassinet is to prevent them from moving around. When people are using this during the day, it's usually just so they can take a quick shower or something without worrying about the baby. Having a mobile over the bassinet should be more than enough sensory stimulation for the 20 min or whatever.