With the interactive online tool „KonsuManiac“ (German language) consumers can prove their daily shopping and their buying behaviour in a playful way. It is about a virtual shopping tour in diverse shops as grocery, fashion store, health and beauty retailer and a do-it-yourself store. But be careful, to have the choice is not an easy thing! Soon you will recognise how “environmentally sustainable” your shopping behaviour is. Supportive didactic material can be downloaded and comprises diverse modules for project-based learning activities, using numerous didactic methods.