A: Did your son enjoy the toy car? B: Absolutely. When I presented it to him, he lit up like a Christmas tree! Note: The phrase “being lit up like a Christmas tree” literally refers to being brightly illuminated or adorned with lights. When used in active voice, it metaphorically describes a scenario where something happens that brings so much joy to a person that their face lights up, much like the way a Christmas tree glows with lights. | 