Otis is now really comfortable working at his table. You can see below that his feet are now flat on the floor. His posture looks good. He is working with some puzzles. Ideally he would start with a circle puzzle. But we only have this multi-shaped puzzle. He has also been playing with some other puzzles (above) that are good for little hands. 

He now has greater control over his environment. He can get out of his chair...

and into standing. 

What an achievement Otis.