The new b is used to a tight environment in your tummy, so using a sleeping bag or tying him tightly is a good suggestion, giving him a sense of security.
If u put him in a stroller, he likes to step on the bar, right? He wants something to step on during his sleep too.
我個b都係, so I hold him tight in my arms then he could sleep quietly lor. Otherwise, his head would keep rolling left to right, feet keep kicking and kicking then may cry after a while ga...