Yarn: Premature babies have very delicate skin and can often be allergic to wool; therefore it is best to steer clear of garments made with a wool mix. Acrylic yarn is more appropriate when knitting for preemies. Ideal yarn to use for preemie knits is baby double knit or 4ply yarn. Most preemie patterns will use these.
One top brand that manufactures this accessory is Knit Pro, and this particular manufacturer supplies it chart keeper to retailers around the world, making it easy to get hold of. Knit Pro also has a number of other accessories that knitters might find useful, ranging from sock blockers to needle sizer.
First and foremost it will be a great way to spend some quality time with your son or daughter. (Yes boys can work with yarn too!)
Knitting items for premature babies can be very worthwhile and rewarding. It is definitely appreciated by the charities and the families who receive them. If you are excited by the prospect of getting your knitting needles working for charity and want to explore charity knitting for other organisations here are some other ideas to help your search.
Finally, one essential accessory to keep your equipment safe is a set of knitting needle caps, which are designed to be placed over the end of your needles when they are not in use. As mentioned above, needles can cause damage to bags that they are kept in, and can even prove a safety hazard, especially if they fall into the hands of children.