Amazon America currently has LEGO Elves The Water Dragon Adventure on sale for $12.79 (reg.$19.99). Savings work out to be 36% off. Free shipping on orders above $35.
If you are a Prime Member, you also qualify for the following LEGO sets on sale as well:
-40% off – Technic Police Interceptor $11.99 (reg.$19.99)
-38% off – LEGO City Cargo Train $123.99 (reg.$199.99)