Enough said really.
Didn't even make it past the coffee shop. Warned DD2 (2.3yrs) that if she continued to wail and fuss (and by doing so, set DD3 off), she wouldn't get a croissant from Grandma and we'd go home to bed. So we did!
To give her the benefit of the doubt, she did have her MMR a week ago, so i thought no trying to reason anymore.
Home, nurofen, bed! Cue much sniveling and guilty looks from DD2 and now resting.