If you need to fill some holes or gaps in wood that you are working on then take a look at this essential and free way of making your own woodfiller.
This is a perfect wood putty alternative and the best way to make woodfiller that looks like wood . You can literally create a perfect matching colour that sands to a good finish.
Mix some sawdust with wood glue to make a paste-filler and fill the hole, gap or surface -for large gaps you will need to build the filling up in layers until it is proud and smooth of the top layer.