Mlyňany Arboretum is 127 years old and it has the largest woody-plant collection in Middle-Europe, with almost 2,000 taxa. Therefore, it is not surprising that this arboretum became a most important research institute focussing on foreign dendroflora, in the second half of the twentieth century. Moreover, each year there is a wide choice from many research – popularising and environmental consciousness enhancing events organized for public/ children. The most popular of these include the Ambrozy´s days, Science and Technology Week, “Plant your own tree” and “The world water day in the Mlyňany Arboretum”. Most importantly, it also has an interactive lesson room, “The Tree´s World”, which provides education services for younger pupils throughout the year. Here, children of all ages can form their own creativity as combined with education on nature protection in a creative workshop facility.