I came across this site a few weeks ago. It's mainly geometric shapes to make - A great stellated dodecahedron anyone?
Most are just the patterns that can be folded into interesting shapes. I made a few of the above on white paper then covered them with "Decopatch" - basically thin paper with small patterns.
I also liked their "Kaleidoscopes" This section has a collection of patterned shapes. These are quite easy to make but the more "spikes" you have the more complicated they become.
They all come as downloadable PDFs and some of them will appear on one of the Christmas trees I've been asked to "dress" in the house where I work.
Go to
https://www.korthalsaltes.com/
for the PDFs
Cheers
Mike