Article continues below advertisementWhile Donald and Melania Trump celebrated the holidays at Mar-a-Lago with lavish parties and a full social calendar, their son, Barron Trump, largely stayed out of the spotlight.According to People, the 19-year-old was present throughout the Trump family's Thanksgiving, Christmas and New Year's Eve celebrations at the Palm Beach estate, but insiders say guests were careful to give him space.Article continues below advertisementSource: MEGAGuests followed an unspoken 'don't bother Barron' rule, a source claimed.