Had planned to make a white picket fence using fondant/tylose in chocolate molds. It's for my daughter's Pinkalicious house. But the molds I ordered didn't come in! I've gone all over looking for a toy fence I could use to mold, but no luck!!
Now I've got very little time and don't want something too complex or time consuming
I would find an image of one on line that you can print out, and then I would make a template with it. Roll out your fondant/tylose fairly thick, maybe 1/4", and then manually cut out the fencing using the template. I've done it for lettering when I wanted something bigger than I had. You could put it on parchment to dry afterwards.
Yes, it is really easy to just cut such a piece. You can make sections or indivisual pickets. Though used as candles here this is the general idea: http://cakecentral.com/gallery/1172206/count-the-candles
Just make them thinner and with a peak (^) on the top.