Sometimes it surprises me some of the things that I do that makes Caleb laugh.  He's a very easily amused little fella.  The other day I was saying his name and he was cracking up.  I can just make faces or sing ABC's to him and he thinks its funny.  His favorite thing to do now is to hide behind the curtains (we had none in our old place) and wait for me to find him.  He loves anticipation.