Crafting is the usage of one or more resources to make a new item. In Cow RP there are many things to craft to help you in the game, crafting is very important when in need of tools, dyes, and pretty much anything you don't start with or are able to find in the wilderness.
Fire can be crafted by pressing the Build button (B is default), selecting it, then clicking an adjacent tile. To craft using carpentry, double click wood in your inventory, then select what you want to make. It'll automatically be sent to your inventory.
To craft using masonry, double click stone in your inventory, then select what you want to make. It'll automatically be sent to your inventory.
Combination is the action of using an item with another. To manually combine, go into the Commands tab, click the combine verb, then drag the items you want to combine together. A quick way to combine is to drag an item in your direct inventory to another, but it only works if they're different materials and they're on the same tab.
These can be made through Combination.
Stone+Stone = Sharp Stone
Stone+Wood = Sledgehammer
Sharp Stone+ Sharp Stone = Pickaxe Head
Pickaxe Head+ Wood = Pickaxe
Wool+Wood = 'Fishing Pole
Bucket+Wood = Churn (places where standing)
Gem+Hide = Goggles