Roly poly little baby (maybe not so little)

So Johnny has been wearing 9 months and 6-12 month sized clothing for a few weeks now and this week I put him in a new 6-12 month onesie from Old Navy and he's already filled it out.  First thing I said, "Oh crap...this one was new."  He's growing at almost a startling rate...Holly wasn't like this at all.  Apparently breastfeeding suited him really well.  His new clothes aren't too small for him yet so no worries there.  But I wouldn't recommend buying him clothes and saving them up for Christmas. I would buy much closer to the time when he'd actually receive anything, that way we're sure it'll fit.  I really don't know when he'll bump up to the next size.  Johnny's favorite thing to do right now is lay on the floor holding his feet in the air or toes to mouth and then just rolling around on the floor like that.  I have to say, that looks like fun.  Johnny has been doing some assisted standing so David decided to crack out the big baby saucer toy.  So it's all cleaned up and Johnny tried it out last night since he certainly has enough stability for it.  We're thinking that the little baby swing will get phased out soon.  We're switching Holly's place at the table because when it's time to break out the high chair, it can only fit in her previous place in our tiny house.  When Johnny's 6 months old the solid food feedings will start so that gives us a month to acclimate Holly to her new spot.