Planks

Planks are a type of block crafted from logs, they are very useful in crafting and will more than likely be the first thing you craft. There are 3 kinds of planks, wooden, firwood, and crimson.

Breaking
All planks can be broken by hand, but using an axe is faster.

Fuel
Planks can be used to smelt 1.5 items in a furnace or 3 items in a forge