The main feature of the SPECIAL KIT are the curved tubes, which are included in the low package price along with many other parts. Of course, the curved tubes from the SPECIAL KIT can be used for normal climbing frame designs.
The SPECIAL KIT is a great addition to your QUADRO. For example, by combining the SPECIAL KIT with a STARTER, it becomes possible to build roofs thanks to the 45° angle connectors included in the SPECIAL KIT.