I recommend in this digital age using the 'record' function on our cellphones to make mp3 sound files of your children reciting the ABC's, counting to 10, saying "refrigerator" and other words that are funny for 2 years old to say. Keep the sound files and mix them into your iPod shuffle, use them as a ringtone, and stuff like that. Like the idea of writing it down, make a recording preserves all this stuff so you can always know what your child's voice sounded like as a baby. In fact, I wrote a blog post about this very topic at www.therainracer.wordpress.com where I blog about parenting issues for Mom and Dads with toddlers on up to pre-teens. So far I've written about what happens when Daddy's Rules Backfire, WHy 10 year olds need cellphones, and the time I had my children talk to their 90-year-old great-grandpa about the Great Depression after they complained about their Christmas gifts.