You can put a baby in a stroller soon after birth, although you may find baby carriers or slings more convenient and cozy. I have always preferred lighter strollers to the fancy ones that come loaded with canopies, umbrellas, and bottle holders. Using common sense, and taking into account the maturation of her muscle tone, you should be able to figure out how far to recline or prop Lucy up. She won’t mind being a little slouched over, even if your neighbors make unwelcome comments. You can use some pieces of hard foam to prop her up and show her off, but as in the crib, be careful to avoid any potential breathing hazards. And even if it’s not the law, buckle Lucy in; stroller falls are more common than you might imagine.