Talk:Leap of Faith/@comment-10265857-20140319192800/@comment-6025526-20140320005640

Probably something symbolic of honesty.

Rarity's key, the rainbow thread, is symbolic of her generosity, because the spool keeps on giving thread to whoever uses it.

Rainbow Dash's key, the Wonderbolts pin, is symbolic of her loyalty, as this is similar to a badge earned in the military for showing outstanding leadership qualities.

Pinkie Pie's key, the rubber chicken "Boneless," is symbolic of the Element of Laughter, because rubber chickens are objects often used for comedic effect.

Fluttershy's key is a flower, an object often attributed with gentleness, and by extension, kindness.

So it's likely that in this episode Applejack will receive a gift that symbolizes honesty in some way.