Long term readers might recall a little op shop treasure I found a couple of years ago- a janome "spiral stitcher".
The instructions left a bit to be desired, but I managed to figure it out. The tricky bit was getting the speed right- the instructions say to sew at half speed but my machine doesn't have that option.
They turned out really well, so cool! Now I just have to think what to do next- use it on a bag, or maybe for a pocket? And I need to try some rainbow thread next time too!