North Hyrule Field
North Hyrule Field is one of the areas of Hyrule in The Minish Cap. The place is infested with Octoroks, and is the location of Greatblade's dojo.
In the center of the field where four trees make a square, Link must do a Kinstone Fusion with each of the five Tingle Brothers. Doing so will open each tree where Link will find both treasures and switches. When Link steps on each switch, a final opening will be revealed in the center of the trees which will reveal a chest with an upgraded boomerang, the Magic Boomerang.
There is also a tree stump where Link can dash into and turn into Minish size.