those are pretty!! I once freeformed a coaster with acrylic worsted weight yarn, the caron one pound and also the red heart combined, it was pink and yellow, I tried to make it look like a flower with a cup holder like petals, it's alright, still holding up and looks new, but not as pretty as these you have posted.
Believe it or not, I got the idea from a pair of slippers I made lol!
What are your thoughts? Your opinions are important to me so if you think I am right on or off my rocker let me know.