5 1/2 months and he is sitting up!

Last night Shea discovered Austin could sit up on his own!!! I had seen him kind of do this last week but chalked it up to a fluke thing....then last night as the boys were hanging out, Shea sat him in the grass and he stayed up right! He ran in to show me and it was quite exciting! So this morning I had him play with some toys sitting up which is what you see in the picture. He eventually topples over---but can hang on for quite awhile. I cant believe we have hit this milestone already--time is flying by!!