In the FarmVille Market you can find lots of new Limited Edition New Year decorations including these items.
Each of these decorations can be purchased for a limited amount of time via the FarmVille Market.
FarmVille Limited Edition New Year Decorations (Released: December 25th 2011)
FarmVille Firework Fountain – 14 Farm Cash
FarmVille Confetti Gnome – 12 Farm Cash
FarmVille Fireworks III – 100,000 Farm Coins