There is no button to press to craft things. You can either use the 2x2 grid next to your armor or you can make a crafting bench which means you can craft even more stuff.
Press your allocated key for inventory, and use the 2x2 table there.
If you have alpha (or full version) you must first press 'i' to open your inventory, build a crafting table (look it up if you don't know how), then lay it down and left click on it to build/craft!Hope I helped ;p
Press your inventory button and you see 4 squares next to your character. That's how you craft things.
You press 'E' to open and close your inventory.
Press the "i" key, the inventory should come up, near the top you'll see for boxes, here you can craft stuff, if you put one would plank in each of the crafting boxes, you can craft a crafting table, which allows you to craft more stuff that you not be able to craft using the four boxes in your inventory. After version 1.4 was released, some of the hotkeys changed. Now you have to press "e" and not "i" to open the inventory with the crafting.
you can't craft in terraria like you can in Minecraft but you have options of what you can "craft" in your quick menu. It just gives you things you can make with the resources you have in your inventory.
Press E
Craft a bone in your inventory or a crafting table.
You press space on computer and, you press A on xbox360
press e to access your inventory, then drag your items for the lower bar to your inventory
If you have updated Tiny Zoo to the latest version, the Inventory (Place for stored items), will be in the Store. Press "Store", then press "Inventory". If you are still on the older version, press "Store" press any category and under that. On the bottom of the category, there should be the "Inventory" button.
Look for the button with a cardboard box and present. click it. then press inventory.