I wanted to make the number 10 out of fondont. I was just going to roll it skinny and shape out the number 10. How do I get it to stayon the cake without it leaning then eventually falling over. I was thinking of make the umber 1 longer and jsut sticking it in but what about the "0".?

I use shish kabob skewers for stuff like that. Insert the blunt (or sharb) end into the gumpaste (I recommend GP, fondant can soften up on you and droop over) number, and then insert the skewer down through the cake into the board. So, actually, use the skewer paointy end down, so you and jam that into the cake board beneath.

Make your number, stick the skewer in, then let it all dry before putting on cake, so make it a few days before. HTH. I think I rambled a bit....ok, done.

Annnnnnd, I can't spell either. Sheesh! POINTY end......and SHARP end!

Toothpicks work great too, make the numbers then put in the toothpick in the bottom and let dry like Jamie said do it a few days ahead and let it dry.

Small (thin) skewers or I used the coffee stirrers when I made the "50" for my own birthday cake (see pic on home page of my website ... link below). I attached the numbers with some melted candy melts and it worked great.