LO is eleven weeks old and still flails her arms and legs wildly when she's asleep, and often when I put her down in her cot. This wakes her up/keeps her awake, so my solution has been to continue swaddling her. However, the nights are getting hotter as summer approaches, so I don't think I can continue swaddling her for long. She likes sucking on her hands, too, at the moment and it seems to frustrate her when she can't.
I've tried putting her in a sleeping bag, but she still kicks around and flails her arms enough to disrupt her sleep. Sometimes, holding her hands and/or feet for a while help her calm down and fall asleep, but this can take ages.
When do they outgrow the flailing arms and legs? Until what age do other people swaddle their LOs? Any suggestions for alternative solutions? If I could find something that worked, I think it would help her sleep so much better -- especially from, oh, 5?7am, which I would appreciate beyond measure!