Good job! Completed all tasks!
To invent a wheel
To invent the principle of the alphabet
To invent the Windmill
To invent the Gunpowder
To invent a Printed Books
To invent the Compass
To invent the Steam Engine
To invent an Electric Light
To invent a Wireless Communication
To invent a Penicillin
To invent the First Transistor
To invent the Global Internet