To create the Sand Vortex, I used paper Mache over a tornado shaped dessert glass. I added extra layers on the high points to really make it pop.
While that dried, I took sand was taken from my kid's sandbox, I used a sieve to filter out only the smallest grains possible.
I mixed a few drops of yellow food colouring into the sand and stirred, then I put the sand in the oven on low heat, to dry it out quickly.
I cut the Vortex mold off of the glass from the back and glued the seam back together, I sized it to Sandman's waist and used Mack Tack to hold him in (It holds strong but I can remove him, if I ever need to)
Next, I painted the mold with glue and sprinkled the sand all around it, touching up as I needed to... I also painted the limbs with glue and added the sand to them... And finally, I lightly brushed his torso with small amounts of glue, mostly along his muscle lines and added some sand to that too.