My DS was like that a few weeks ago. I think its coz they are noticing more of their surroundings, but can't quite move around as easy as they'd like.

Well that was DS's problem. Now that he's Kinda commando crawling/spinning/rolling to getto things he's a bit easy to entertain.

I also have a walker for him so when I'm reslly desperate I can put him in it so he's up off the ground. He likes it.