Eco-efficiency is defined as the concept of doing more with less; in other words, creating goods and services while preserving natural resources and reducing waste and pollution during manufacturing. This paper presents a toolkit for eco-efficiency at factory level: the Factory Resource and Energy Efficiency (FREE) toolkit. It contains five key elements; (1) see waste, (2) find solutions, (3) set targets, (4) assess yourself, and (5) create good habits. The FREE toolkit contains a range of games, tools and methods mapped against these five elements to integrate sustainability into factory activities. This paper presents the toolkit structure and an example of the journey for eco-efficiency.