TuKit is a website designed to support existing groups (in schools, kindergardens, churches etc.) in implementing local social and environmental projects in Cologne by providing concrete instructions and materials. Its goal is to empower people to take collective, sustainable action in a way that is accessible and yields immediate results. The focus lies on the shared sense of achievement and its psychological impact; environmental psychology suggests that experiences of collective self-efficacy significantly boost people's confidence and capacity to act. This is precisely where TuKit steps in, offering an accessible, innovative toolkit of local action ideas for Cologne to help bridge the "attitude-behavior gap."

A key feature of the website is the "Projects" tab. Here, users can find a growing collection of actionable ideas—such as community gardens, clean-ups, clothing swaps, or mindful nature walks. Each project comes with clear instructions and all necessary communication materials (flyers, posters, social media templates). An important feature is the filter and search function, allowing users to narrow down options based on criteria like group size or difficulty level. Other tabs include "Inspiration" (a best-practice section featuring photos and feedback from past initiatives), "About Us," and "Downloads."

TuKit contributes to the UN Sustainable Development Goals (SDGs)—specifically Goals 11 (Sustainable Cities), 12 (Sustainable Consumption), 13 (Climate Action), and 17 (Partnerships)—while creating direct added value for the city of Cologne.