I love Pinterest there are so many ideas and crafts that anyone can take on as a project. I can understand how cat scratching posts can get expensive, but I came across an inexpensive way to make your own!
All you need is an old wooden stool (you can get this at thrift shop) and sisal rope.
Around the legs of the stool wrap the sisal rope that creates a layer on the stool legs. You can even go across to make a little net (as seen pictured above) so your kitten can sit and scratch!