A 6-month-old baby doesn't have a full understanding of the concept of Christmas, but you can still celebrate the holiday with them. Some ideas for gifts include soft toys, interactive toys, board books, baby-safe musical instruments, and age-appropriate board games. You could also give the baby a special outfit to wear on Christmas or a keepsake item like a photo album. If you want to give the baby a more traditional Christmas gift, consider a Christmas-themed baby blanket or a set of Christmas-themed baby clothes. Whatever you choose, make sure it's something that the baby can enjoy and engage with.