Use compressed air on a 3d gantry to sculpt sand. ( or excavate building foundations. )

Perhaps carving heart shaped things in the sand.
-- popbottle, Feb 13 2017

A air digger in action. https://www.youtube...watch?v=ur8nbEJxXD8
Wear a dust mask! [popbottle, Feb 13 2017]

Weird. I just watched that exact video the other day.
-- 2 fries shy of a happy meal, Feb 14 2017


An additive version might use that new product I heard about Brown 25.
-- popbottle, Feb 14 2017



random, halfbakery