I had a wooden quilt hoop that I just couldn't throw away. It's lived at a few addresses and served it's purpose, but was no longer needed, as I upgraded. When I was brainstorming how I wanted to make a mobile for my new baby, that quilt hoop came to mind. And it worked perfect!
2) Drill a small hole in all four corners.
3) Drill a hole in the center to insert a screw eye and nut.
4) Cut four longish equal sized pieces of fishing line and tie them to the four corners.
5) Attach whatever you wish to the fishing line. I did origami boats and crabs. I found the pattern for boats in a book I had. I couldn't find an easy crab pattern in the books I had or online, so I created my own. I did the basic crane pattern. For the crane's would be wings, I tucked them inside. For the crane's would be tail and head, I folded to resemble claws. And then with little eyes, it's a crab. I used a needle and thread to loop the pieces on and then secured them with a knot.
Cost: $ 0.15 for the screw eye I had to buy.