It's a stacking toy. I have already had this idea for some time, at first I wanted to knit, but when I got a sewing machine, of course I thought of sewing. But while I was thinking, one Latvian girl made it:) It can be foun here on her blog "mammas rokas" (mother's hands). But actually I was happy, because I think my creativiness would end with making those rings with different things to touch and look at. So I get the idea of making some kind of ...animal or what ever.
But here is mine, not perfect, but just the first trial