A childhood is mostly the small Tuesday. The school morning, the homework, the dinner. Alongside it come the train rides, the beach days, the new cities, the unfamiliar breakfasts. So they get two books. One helps them notice and grow through everyday life, twelve weeks at a time. The other keeps the journeys, the memories, and the small details that would otherwise disappear.
Same handwriting. Same pen, often. Years from now, both books will sit beside each other on one shelf. One shaped the days as they were living them. The other brought the memories back long after the trip ended.