At the risk of sounding like a useless mum, what are you actually meant to do to entertain a 3 month old. She hates going out in her buggy and screams the whole time, she will go out in a sling but usually just closes her eyes. She has no interest in toys yet, and will sit in her bouncer for a few minutes if im bouncing it, but not alone.
She spends pretty much the whole day being held/in her sling and half asleep, which doesn't bother me, but it just doesn't seem like she's getting much stimulation, though she never seems bored.