(This is a filly Luna and Celestia story, so when I say "Tia", it means Celestia! Teh cuteness intensifies :rainbowkiss:)
Celestia and Luna go outside to play one sunny afternoon, and Luna asks to play with her sisters crown. At first, she isn't very sure about it, but Luna convinces her. She takes it into the woods to pretend she's "The princess of the trees", and she accidentally loses it. So with the help of the great filly adventurer, Daring Do, the ponies set out on a mission to find the crown.