These entries will be appreciated later on. This method is an easy way of noting down life's travels, and makes rereading the journal a lot more fun. You may not remember the exact date you went to see the African Drummers, but that ticket stub you find later in a pocket can record it for all time. Reviewing one's life is a pleasurable activity. It gives a sense of accomplishment.
Human memory is an elusive thing, but the power of memory jolts are amazing.
Write down one sentence worth of detail about a particular event, and it will all come back to you a year later when you read it. For a child, a life history becomes an incredible gift. As adults, the children we were almost seem like different people. You can provide your child with a record of such things via scrapbook journalizing. So are scribble letters.