I've understood babies could use some stimulating toys, something that they are able to touch (and chew) and the toy gives different feedback either in the form of feel or sound. I had some scraps of fabric lying about and decided to make a really quick stimulating rag from the scraps. I dug out my other fabric scraps and ribbons and got going. The fabrics on the rag have different textures and then the added ribbons also feel different to the hand. Also there are various colours, which the kid can also find intriguing.
We'll see how interested the kid will be of the stimulating rag, but anyway it was fun and very easy to make.