It is quite common to see “Do It Yourself” Will Kits in Newsagents or Post Offices. They are often inexpensive and contain directions in relation to how they should be filled out.
There is nothing stopping you from drafting your own Will or using one of these Will Kits – that being said, a Will must conform to strict legal requirements and if it fails those requirements the Courts may decide that it is not a valid Will. If this is the case then there is no Will, and your assets may be distributed in a manner which was not your intention.