My baby is 11 weeks old and since week 3 she has been so difficult getting to sleep during the day.  My friends and family are shocked- they are used to newborns wanting to sleep a lot. Th bonus is that she does sleep great in her crib at night (6-8 hours straight). Anyways, when I do get her to sleep during the day I slip her into the swing or rock n play. I stopped attempting to put her in the crib.