ok, great.We just introduced the exersaucer, propping him up in it--he loves it, and is so happy to bounce. I now this may not be the spot to post, but just one more quick question. He sleeps on his tummy, and in the wee hors of the morning he has been flipping on his back, and unable to get back to sleep this way...so evevtually i quietly go in and flip him, usually more than once. Is this okay to do? I would like for him to work this out on his own, but it is hard when you want to get back to sleep, plus it interferes with his night rest. What do you suggest I do? Thanks again, Hilary So far so good on our 3.5 hr routine. When do lo's generally need to bump up to the 4 hr one?