Pmsl wrestling an octopus- that's exactly what my 7 month old boy is likeI know. Lazy parenting aside. If they were my kids and where still happy to be lying on the floor I'd have had them off to the doctors/hv to check they were ok. It's really not normal for them to just lie on their backs at that age, and i truly hope there's nothing developmentally going on with them. My boy is 7 months and it's like wrestling an octopus now just to get him to stay on his back for a nappy change!
If she does read this, please, please get them checked out Nikki, even if it's just to put my mind at rest!