Find yourself loitering by the elf outfits in Johnny Lew, even though you swore you’d never dress your kids up at Christmas? Here are six of the best festive pieces to ensure they retain some dignity this Yuletide. Guest edited by Josie McNamara. Little Goodall $160 littlegoodall.com   Mamas and Papas £12 mamasandpapas.com   H&M...