a set of banners. a group of children walking outside in autumn. girls and boys are playing with falling leaves

activity autumn background banner boy brochure character cheerful childhood children climate collection colorful concept cover decoration emotion fall feeling flat flyer foliage fun garden girl happiness hello holiday joy kid kindergarten leaf leisure lifestyle outdoor outside park person playing playtime poster rainy season set surprised teenager template vector walk weather banners group walking autumn girls boys are falling leaves leaves fall season illustration style