These Japanese flower frogs also know as Kenzan, are used in ikebana, the traditional Japanese art of flower arrangement. They smartly allow you to create floral arrangements by utilizing the spikes of the "frog" to place your flowers.  The frog sits in water.  You don't need to be an ikebana pro to enjoy using these, try them in a shallow vessel or a tall one.  

Spikes made of brass.

Made in Japan