Go low tech - a pencil and paper never fail (unless bambino is big enough to grab it from you and chew on it).
The lesson of the week in my household is that BlackBerries ARE NOT teething toys, so I would hate to see what he would do to a pencil. Besides, part of my broken keyboard issues came from SOMEONE thinking it may be fun to pry the space bar up while Mommy wasn't looking. This exploration age is FUN! Har.
I have a new keyboard now, so I am getting back on track -- and keeping my little assistant far, far away from my laptop.
