K.S.
I know this isn't a recommendation for a computer game or a learning system, but I would just recommend simple books. You could pick up several new books and sit with him and read to him. There is no game or computer that could compete with that learning and bonding that will take place, especially with a new baby coming. I didn't have real great luck with the computer games and the kids at that age and went to book route. I now have 2 kids that love their books and love to read and have stories read to them. Good luck and Blessings with you new baby.