It's amazing how a baby's development will jump by leaps and bounds.  All of a sudden over the last week, Tyler has discovered that he has hands, and they are good for grabbing things!  Before this, he would hold on to something if you placed it in his hand, but he wasn't reaching for anything.  Now, he not only reaches for things, he knows that once he grabs something he can use his hands to manipulate it, move it around, and of course -- stick it in his mouth.  :)