The Magic Crayon is a tool from the OpenBlocks mod. This tool is used to create invisible blocks that can only be seen when wearing the Crayon Glasses of the same color. There are different modes for the Magic Crayon to use; Block, Panel, Half-height panel, and Stairs. Block will place a normal block, and consume 1 durability. Panel will place a panel-sized block, and consume 0.5 durability. Half-height panel will place a slab, and consume 0.5 durability. Stairs will place a stair block, and consume 0.75 durability. There are also Inverted versions of these modes, which can only be interacted with if the player is not wearing the Crayon Glasses.