They are also based on the work of the British organization, The National Trust, which focuses on the protection of nature as well as cultural heritage and monuments. The National Trust put together an activity list of “50 things to do before you are 11¾“. The list is based on scientific findings that children form their relationship with nature and their surroundings in the years up to 12 years of age. These experiences affect whether and how they want to care for and protect the environment (not only the natural one) around them.