Baby Vivien's laugh is like the very definition of a chortle and it has cheered us up no end on this grey day. We long for the simpler days when someone blowing raspberries could elicit this kind of delight in us. Although our humour has obviously not evolved all that much as Vivian's giggle-bursts are cracking us up.
https://www.youtube.com/watch?v=Sc4fs9bWPLU
