Assuming you are referring to a Minecraft crafting table:
To open your crafting table in Minecraft, you first need to gather the necessary materials. You will need 1 block of wood (planks), which can be obtained by destroying trees with your bare hands or with a tool such as an axe. Once you have the wood, open your inventory and select the crafting table icon. This will open the 3x3 crafting grid that is used to create most objects in Minecraft. To create a crafting table, place the wood in the middle slot of the grid.