The charities have a lot of information on their websites, below is some general advice to help you get those needles clicking.
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!)
Bonnie Babies mainly makes blankets for premature babies. They provide patterns for toys, hats, and sweaters (including a ”5 Hour Baby Sweater!”), but blankets are quick, simple to make, and guaranteed to fit. Families can then continue to treasure them long after the child is grown.
Bliss: One of the many ways that you can support Bliss is by knitting for babies in special care units. Knitted items are most helpful for babies about to go home, but there is also a need for blankets and hats for babies in hospital. Knitted items are often not suitable for intensive care units – stitched cotton is preferable. However for larger babies, and in high dependency and special care units, knitted items are often very welcome.
It can be a great asset for when the child becomes a teen as this is usually a time when there are many differences between the parent and the child. Any kind of needlework which you share can help to eliminate differences, tensions, and arguments, and bring you closer together.