Sandstone

Sandstone is a solid block, crafted by placing four blocks of sand in a crafting square, in a square shape. This means sandstone can be created without the use of a workbench. Placed sandstone can be harvested with a pickaxe.

Uses

 * Sandstone can be used to make sandcastles, as the sandstone blocks are not affected by gravity.
 * Spiders cannot climb sandstone.

Example
http://www.youtube.com/watch?v=Abm7YdsjSck