Attention, ball coming! After passing through the rattling curves and rushing through the ringing tunnel, the large ball causes the building blocks to collapse – kids love it! Kullerbü captivates them from the very start! While the youngest ones prefer to explore the ball and watch in awe as it rolls around, the older ones want to help with selecting and building the pieces. Over time, a simple straight line can evolve into a complex track – always tailored to the child's developmental stages. Various elements provide extra fun. Tip: Creative minds can constantly redesign their tracks, for example, using books as tunnels or track extensions.