Sitting up like a big boy!

We've hit another milestone.  Our little man is sitting up all on his own now.  He will sit on the floor and play with toys for hours now.  We thought he would do really well in the tub then too.  Oh no!  He kept falling over and actually took a nose dive into the water.  He ended up swallowing a bunch of water but brushed it off and kept playing.  He's going to be one tough kid!