Congratulations.
Perfect excuse for new toys. Go into the local toystore, find something that catches your eye, and buy it. "Just for when he's a bit older", you say.
I used to buy those small Lego kits, assemble them, and stick them on top of the computer at work. When I got bored with them, I'd go get another, and repackage the old one as it was when I bought it. Gave those to the neices and nephews at family functions. Win-win.