What are some products some of you mommies got for your babies that were life savers that you'd…

What are some products some of you mommies got for your babies that were life savers that you'd recommend to a first time mom? My SO and I are working on our registry and we're kind of stuck and want to know if there are any items (ex. Carriers, particular bath time products, particular pack n plays, activity centers, etc.) that you guys have sworn by and would recommend to other parents? Thanks in advanced! ❤️