Here are a few hints for summoning Sprites:
-At the perilous precipice, play the Song of Sworcery and interact with the two rainbows in the sky.

-At the stolid log bridge, play the Song of Sworcery and interact with the four pairs of trees on either side of the river.

-At the sheep's meadow, play the Song of Sworcery and interact with the sky just above the "oddly shaped stick overlooking the meadow."