My younger son was about the same age as yours when I was laid off....we had such fun together...we'd hang out in the morning, then when it was nap time for him in the afternoon, that was my job search time...

The saying is corny, but I do believe it is true, "when one door closes, a window opens.." I've been laid off twice, and both times I ended up in better places then where I left...I'm sure you'll find the same...in the meantime, enjoy the days with your son...you will miss them when you don't have them anymore.