Wood blocks are a material used in crafting. They can be crafted from 10 wood.
A wood block
They are an ingredient in the following:
Boomerang
Crossbow
Bow
Wood Hammer
Stone Spear
Copper Spear
Iron Spear
Silver Spear
Gold Spear
Net
Pulley
FanBlade
All wood armors
Auto X Box
Workbench
Windmill
Weapon Rack
Blade Trap
Scarecrow
All Mines
Small Farm
Sawmill
Pasture
Medic Kit
Large Farm
Crate
Cabin
Box
Bookshelf