I've moved all 3 DC "up a bed" tonight and so DS2 is going into the cot for the first time. I wanted to put him in a grobag from now on as they're so much easier but I can only find 6-18 month ones, and he's only 3.5 months ... do you know of any terrible safety hazard there might be if I just bung him in and zip him up? He looks ok in it, just a little nonplussed, and with LOTS of legroom(!)
But I'll bow to your greater knowledge if it's dodgy!