A quick one- my 25 week of DS has developed a habit recently of not only migrating up his cot, but rotating 90 degrees so he's widthways. Much as this provides a bit of hilarity at 4am, it is something I'm keen to stop as he has actually started to get stuck (he's longer than the width now) and so puts his arms through the bars and gets even more stuck.
He goes in his grobag with blankets securely (ha!) tucked around him yet still manages a houdini escape from the blankets. The grobag he just takes with him.
DH suggested sewing some velcro tags on the bottom of grobag to go around the bottom bars of the cot, but I'm (definitely) not convinced.