Add some washi tape to the "spine" of your pocket card sleeve and add some string/fibres and little charms in keeping with the theme to the "hole" in the spine as shown below.
Start with your smaller Kraft cards and use the stencil, brown ink and sponge to stencil the cards. Adhere these stenciled cards to your ATC black backing cards and use your sewing machine to create a fancy edge.
Stamp the large "Bee" from the Heart of Nature Set onto the scrap kraft card and fussy cut. This will be the focal image of the mini pocket letter. Stamp your sentiment onto scrap kraft card also and cut or tear out.