How does this work? When I do it with DD (8 months) she goes from very very sleepy to instantly awake, starts crawling round her cot, and is currently laughing at me (I'm on my phone). She is now attempting to pull herself up on the bars whilst she's in her sleeping bag, it's taken a good few attempts but she's managed it. Now she's thrown her dummy at me. She was basically asleep 5 mins ago. Sigh. Any advice?