N turned 6 months old today. How are all the about 6 month babies doing?

Over here, N is working really hard to sit up and is rolling both ways and turning around on his belly or back to reach things. We just started solids at dinner time a few days ago since he is showing a lot of interest. Thus far it seems that his tummy is a little upset by it so we might back off a bit. It is so hard to tell for sure though, since he still spits up a lot.