Many years ago I found this website that showed how to fold paper to make snowflakes. Today, I decided to do it again including the younger kids who had never done it before (or couldn't remember having done it) and an older kid who couldn't resist having a go.
Snowflakes are amazing. Here are some links that I found all those years ago.
A little scientific explanation about snowflakes and snow crystals.
A snow crystal gallery
How to make snowflakes with a lot of links down the side.
PS: I really can't handle seeing 8-pointed snowflakes in winter decorations.