Cut one long strip of felt out of the first complimentary color and fold it up about 3/5ths of the way and glue the sides together.
fold the top down and glue down the wiggly eyes.
Open it back up and cut out a half circle of the 2nd complimentary color, a little red tounge, two sharp white triangles, and velcro (make sure you line them up before you glue them! Glue everything down as shown.
Give your monster some fierce spikes out of the complimentary color.