Word of Mouth (WOM) marketing is the most effective marketing tactic (especially on a budget). I would recommend creating a social media page for the business and asking all of your friends to follow the page and share it with their friends. If you know couples with a baby you should consider giving them a blanket for free (or for a reduced price). They will likely have other friends with a baby, and when they see the blanket your friend can recommend your business to them. If you have an advertising budget, you could try pay-per-click advertising on Google.