Let's Ride aims to get kids into pony trekking. The Filly branded campaign will be highlighted in the girls' titles Pony Pals and Pony Magazine.
Participating stables will display posters featuring the Filly range and children who take part will receive a Filly certificate and a Filly foil bag to help start their collection.
Claire Powley, girls brand manager at Flair, commented: "We are delighted to be working with Signature Publishing on this worthwhile campaign.
"Little girls love ponies and this scheme is offering the chance for even more girls to experience the joy of riding this summer. On top of that they will receive their free Filly gift and certificate which has presented an ideal targeted sampling exercise for the brand."