Usually this calendar children are in elementary school, but you can start earlier. Get a special notebook and will line out for her on the days of the month. On each day to turn the page. Daily put icons: clear or cloudy, quiet, etc. to Fill in the calendar better after a walk. Preferably on the page to draw something that you saw or did on the street. It may be autumn leaf, snowman, rain, found the mushroom, berry, flower, stream, icicle - all. what was most memorable about the baby. Then it will be not only the nature's calendar, but the first personal diary.