Roll out the brown and red flower paste as thin as you can without tearing it. Let the pieces dry from both sides for 1-3 mins. Cut out a smile and the tongue as shown in the photo. I used an 8 mm teardrop cutter. You can use a similar size round cutter instead. Let the mouth dry for some time (same as the eyes).
Don't let the mouth and eyes dry out completely, because you won't be able to stick them with glue.