The invention is related to climbing trees. Climbing trees are used for a variety of purposes--cats and other pets and small or slightly older children can derive a lot of pleasure from activities in a climbing tree. Using a specially designed bracket the shape of the climbing tree can be expanded and changed in an almost unlimited range of combinations. The climbing tree can be adapted to the physical aspects of its surroundings. These make the climbing tree exceedingly useful and practical. The new invention consists of different types of brackets to be secured to the columns and where the brackets are the link to new imaginative additions to the climbing tree. The invention can fulfil claims in which the column can have any shape imaginable--e.g. square, triangular--such that the brackets are simply physically shaped to suit that of the column.