You cannot splice SAND. You have to buy it or acquire it otherwise. SAND is in terrain category. You get experiance points for breaking SAND. How many times you need to hit it? Head to the wiki for more info: <a href="https://growtopia.fandom.com/wiki/Sand">sand</a> By default you should get at least 1 seed back. Profiting with this might be questionable. Will you get enough blocks to build something? You just have to find out yourself.