Humans are made by combining Life and Clay. Below are the recipes you will need to use in order to reach that stage.
Fire + Earth = Lava
Lava + Earth = Volcano
Earth + Ocean or Sea = Primordial Soup
Volcano + Primordial Soup = Life
Once you have made Life you will be able to combine it with a variety of new things which includes Humans, Animials and Plants. Below are the recipes you will need to make a Human.
Earth + Water = Mud
Air + Air = Pressure
Earth + Pressure = Stone
Air + Stone = Sand
Sand + Mud = Clay
Clay + Life = Human
Below is a list of the recipes using Humans.
Alchemist = Human + Gold
Allergy = Human + Dust
Angel = Human + Bird or Light
Astronaut = Human + Solar System or Mercury
Blood = Human + Blade
Butcher = Human + Meat
Cold = Human + Rain or Wind
Corpse = Human + Blade, Bullet, Explosion or Time
Cyborg = Human + Robot
Cyclist = Human + Bicycle
Domestication = Human + Animal
Engineer = Human + Machine
Family = Human + Human or House
Farmer = Human + Plant
Fireman = Human + Fire
Glasses = Glass + Human
Hacker = Human + Glasses
House = Human + Wall
Love = Human + Human
Mermaid = Human + Fish
Ninja = Human + Katana
Potter = Human + Clay
Sailor = Human + Ocean, Sea or Lake
Scientist = Human + Telescope or Universe
Sickness = Human + Bacteria
Swimmer = Human + Water, Pond, Lake etc.
Tool = Metal + Human
Vampire = Human + Blood
Warmth = Human + Heat
Warrior = Human + Sword
Watch = Human + Clock