Your local craft store will have hair clips that are covered with ribbon saving you from messing around with your glue gun and receiving minor burns.
Stack two pieces of felt on top of each other. Cut any shape that you desire. (You can free-hand your shapes or print, cut, and trace Microsoft Word's Auto Shapes for templates.)
Add a button or two for embellishment to one of the felt pieces. While placing your button(s), be sure to allow enough room for the following step.
With embroidery floss, stitch around the inside of the shapes knotting the floss at the beginning of your stitching and at the end.
Glue your shape to the clip with a glue-gun (okay, okay... your safety was only guaranteed for a little while... here come the burns) or tacky glue.
Carrot Green Instructions:
Cut a rectangle from green felt that is approximately 1.5"x 3". Make cuts from one side of the rectangle leaving about 1/2" at the bottom that is uncut. Roll up this rectangle and secure all layers by sewing back and forth through the bottom of the greens. This bunch can now sit between the two felt pieces that are cut like carrots. Glue or sew it in place and continue with the steps above. (Notice that the carrot is glued on the clip lower than the other examples shown. This provides stability for the long shape. It will sit further down in the pages of your book.)