Recycling old jeans

I haven't accomplished much the last few days but one thing I have been doing is going through bags of old clothes to sort out what to give away and what can be re-used.

I've chopped up some old jeans and started making a new mat for the dogs. I've made the top:

And haven't decided if I will make the back patchwork denim as well or use another hard-wearing fabric. And whether to stuff it, make a pad out of several layers of thick wadding, or to fill it with bean bag beans.

I've also been playing with another jelly roll, making these blocks:

But they aren't going terribly well. None of the blocks have all the seams and points matching up in the centre so I'm getting frustrated.