Why do my 6 months LO keep making the spitting of saliva action.. like bu.. bu.. When he is on his tummy. Is it normal?

😂 i train my LO to say PAPA wheneva i hear e bubu spitting saliva sounds. Very fast my LO stop e bubu after a few weeks of 'training'.

Like blowing bubbles kind? My 5mo did that back then. After awhile they stopped already. I asked the PD, He said its normal.

yes, it's normal. my LO also does that till now.

It's normal! They are playing!