You may have to melt a little more wax and pour it around the wick to help the wick stand in place. You can decorate the outside sand crust by gluing on sea shells, or you can carve a design in the sand with a sharp instrument. Fine pen drawing. This is especially good for young children to do alone. No preparations are necessary.
Observation is the key to drawing.
Pick a flower or a leaf. Look at it and memorize how it looks. Now put it away and make a line drawing with a fine-line pen. After you have completed your first drawing, hold the flower or leaf in one hand while you draw it with the other hand. Look at it very carefully as you draw each part.