Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.
NumPad1: Infinite Health
NumPad2: No Thirst
NumPad3: Free Crafting
NumPad4: Unlimited Backpack Size
NumPad5: Super Speed
NumPad6: Unlimited Jumps
Free Crafting: While active you can craft for free and without needing the required materials.
Unlimited Backpack Size: While active open your inventory and you have unlimited backpack size.
Unlimited Jumps: While active you can jump unlimited times. Press repeatly to 'fly' and reach higher objects.
Unlock more trainer options including updates from here - Die Young Trainer