is it ok to let my 3 month old baby sleep during tummy time (watching him, obviously). he always falls asleep during tummy time even if he's recently had a nap.
he's more interested in sleeping on his tummy than he is trying to lift his head etc
is this normal? should i be waking him up so he doesn't associate tummy with sleep? i know tummy time is meant for play and 'exercise' but he's just not interested!