12 cobblestone blocks - Mine grey cobblestone blocks with a wooden pickaxe or higher. 1 iron ore - Mine an iron block with a stone pickaxe or higher. Iron blocks orange-speckled blocks typically found amongst cobblestone. 2 blocks of wood - Chop two blocks of wood beneath a tree. 1 redstone - Mine a redstone block with an iron pickaxe or higher. Redstone is represented by red-speckled blocks most commonly found below ground. 1 slime ball (optional) - If you want to create a sticky piston that both pushes and pulls blocks, kill a Slime enemy to get a slime ball.

In Minecraft PE, tap ⋯ in the bottom-right corner of the screen, tap the crafting table icon in the lower-left corner, tap the “Wood Planks” icon, and tap 4 x on the right side of the screen twice. On the console edition, press X (Xbox) or square (PS), then press A (Xbox) or X (PS) twice.

In Minecraft PE, tap the furnace icon, which resembles a block of stone with a black hole in it, then tap 1 x. On the console edition, scroll over to select the crafting table icon, scroll down one, and press A or X.

In Minecraft PE, tap the space on the ground in which you want to place your furnace. On the console edition, face the space on the ground and press the left trigger.

In Minecraft PE, tap the iron ore block icon, then tap the “Fuel” box and tap the wood plank icon. Tap the bar in the “Result” box to transfer it to your inventory. On the console edition, select the iron ore block and press Y or triangle, select the wood plank block and press Y or triangle, then select the iron bar and press Y or triangle.

In Minecraft PE, tap the piston icon, which resembles a cobblestone block with a wooden top, then tap 1 x to create the piston and add it to your inventory. On the console edition, press RB or R1 four times, then scroll all the way over to the piston icon on the far-right side and press A or X. On the console and PE versions, you can also select a sticky piston, which resembles a piston with green goo on it, if you have a slime ball.

This step will only work for the computer edition of Minecraft.