AI'm new to fondant and was going to play around with making some things as practice. If things look good, I would like to be able to keep/use them. How long do they keep? What's the best way to store them?
Fondant decorations will last for weeks or even months if you you want them to dry hard. If you want hardened decorations, just keep them in a dark place loosely covered so they stay clean and dust free. Exposure to light will allow them to fade, especially colors like pink and purple. If you want the decoration to stay soft you will need to keep them in an airtight container. Even then, they won't stay soft for for that long.
I'm decorating a Dr. Suess cake this weekend and I've been making the decorations a little at a time for the past month. It makes the decorating part so much more fun when you have everything ready to go and you don't feel like you have to rush to get the cake finished.