Customised – The box slide at the Griechische Allee kindergarten in Berlin / Germany. A special highlight of the kindergarten in Griechische Allee is the customised, trapezoidal double wall slide with a width of over 4 metres. The challenging task was to integrate the box slide into an existing concrete structure. But the effort was worth it, because now up to 12 children can use the wide slide at the same time and have fun together.