Congratulations on your pregnancy, If you think long term I don’t think you can have enough blankets. they always end up on the floor. throw off at the school when waiting to pick up other kids usually in something wet/muddy/leafy. always some in the wash not to mention the amount you use just for their bedding.
I have a book by Debbie Abrahams 100 more squares to knit. which I love, she uses cotton. the squares work out to be between 6-7 inches, so is not heavy and you can easy knit one in an hour or so. you can of course use any yarn that speaks to you. I would recommend anything that is hard wearing and can be washed and washed and then washed some more. I could not live without my tumble drier. after learning from the first two kids my third have a lot less clothes because I found I always had to many and by the time I got around to try something out on him/her they would have grown out of it.
Another thing that springs to mind is a knitted soft toy there are so many cute patterns whether you like bears or hippo’s. My daughter is 13 soon and her favorite thing is a little bear somebody gave her when she was eight weeks old. I can’t tell you how many times I had to stitch up tears on that thing (made of fabric).