What can you make when you have spare time?

Instead of staying in front of my compurter to kill my time, I decided to do something creative 15-20min. a day.
And let's see what I can achieve several days, weeks or months later.

Here are what I made today.

I spent 20-30min. to make four of them.
I used some extra fablic that I can't use for anything for making these.
I don't know how to call these things in English. In Japanese we call it "yo-yo".
Perhaps the shape is similar to yo-yo!?

I will make some more and put them together to make a cushion cover ro something.
Let's see how long it will take till I can see the finishing project.