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!)
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.
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.
The charities have a lot of information on their websites, below is some general advice to help you get those needles clicking.
With knitting being a very popular hobby in many countries around the world, there is a huge number of retailers all offering various thicknesses of knitting yarn, along with a variety of knitting accessories that are claimed to be more or less essential for various projects.