8 months

He is not crawling yet, but he gets on all fours sometimes to practice swinging back and forth and he can get around pretty well, by turning around, pushing himself backwards, or by... I don't know how to describe it but take a look at the third picture. He can get things pretty far and come back to sit again which is quite amazing to me. And may I add that he is so big that he wears 12 -24 months clothes and they don't look big on him.