The Opal open-air laboratories initiative celebrates people engaging with nature. Run by the Natural History Museum and the National Biodiversity Network, Opal aims to get people involved in exploring and enjoying their local environment. Hat-Trick Design was briefed to create cheap and simple direct mail material to be sent to educational organisations, to encourage recipients to get out of the classroom and into their gardens. The identity uses the initial 'O' as a magnifying glass, with a plethora of flora and fauna imagery within it. This was applied to literature, posters, website, stationery, direct mail material and newsletters.