My two kids are above 6 and though I did not tell them to have any resolution but since my eldest daughter have one that she will religiously follow her dance classes throughout the year, so my younger son too has one, which is...that he will always clean up his room after he is done playing. :) I hope they stick by it, especially the younger one. ;)
HI, My daughter is 6 year old and she and I not exactly a resolution but promised each other that she will not cry for no irrational reason and I will not scold her at all, but patiently make her understand what went wrong.
My pamangkins do their new year's resolution in a type writing that they have to post on their room walls.
Shruti Biswas