Winslet, 40, has admitted that bullies made fun of her appearance growing up, reported People magazine.
As an adult, the actress has cultivated a positive body image and made it her mission to help others build self-confidence.
"Daisy Chain" is a whimsical story about a young girl who is bullied, and through the help of a friend she learns to create a "daisy chain" so strong that even her bullies can't break it down.
The five minute video with hand-drawn animation was inspired by Davis' 9-year-old son, who came home from school and confided in his father about being picked on by a peer.