Don't just write down when and where your children were born and how much they weighed. Add some other fun details, such as what their favorite color is, favorite cartoon character, favorite song; where they live adn a picture of the homes they've lived in. Document 18 years instead of just the first five then give the book to your child as a graduation gift. On rainy days, cold winter days or just any day you and your child can reminisce the changes in their life.