I think ribbon flowers are fun to make - there's a tutorial
here which is the one I like to do, with grosgrain or twill. I know there are also rolled ribbon flowers and a rose made a bit like those concertinaed Christmas decorations, but this one is my favourite.
Something else a bit different is this
Ribbon Frame which we did as a TLC challenge over three (yikes, where did that time go!!) years ago.
That's a challenge I've revisited several times, I think it's a great way to use ribbon. Here's one of the cards I made using it -
FTTC48 Daffodils by Cook22 - Cards and Paper Crafts at Splitcoaststampers