A good baby carrier!!
The baby book can be picked up at goodwill for a couple bucks, and is a great reference.
If she is interested in cloth diapers that is a great route to go. As a first time mom with no virtually no budget for baby stuff, the hugest blessing has been our friend who passed down cloth diaper stuff. She got some of it from a diaper service that was discarding stained & worn ones, and they look pretty sad, but we have had to spend almost no money on diapering which is amazing.
All I felt like I needed were diapers and a carrier, and those were the things people didn't buy from the registry.
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