Can you cut something out of cardboard and paint it or paint it and then cover it in felt? The cardboard would be sturdy enough to stand up.
Is that a specific project you saw on here. You'll have to go back where you saw the project and ask there. Not sure how paper platters could make a hat or what paper platter holders are.
This shows a picture of what a Hometalk member did to make a snowman with chargers, however her blog is no longer online. It should give you the basics.
Here's one made with kids in mind using paper plates. You could use the holders instead if you like.
I hope one of these gives you some inspiration. Wishing you the best.
Hi Sue: Check this site and see what you think. I couldn't find anything using 3 paper plate holders, though :( https://www.pinterest.com/preschoolplanetus/paper-plate-snowman-craft-idea-for-kids/ Good luck and happy crafting