Hehe - that sounds cute. I've heard of one girl getting her legs stuck up around her chest inside the grobag, and the parents gave up with the whole sleeping bag idea LOL.

We've had no success with a grobag ourselves.. he fights it like there's no tomorrow. I actually dress him in warm pj's, and a knitted vest, and then put him under the blankets. He usually wiggles his way out of the blankets down to his waist, but with the vest on I know he won't get too cold.