Toy building set with an overload-safe linear actuator

A linear actuator for a toy building set, comprising:

• a centre axis and two thread parts, the two thread parts comprising a first thread part with an internal thread arranged concentrically to the centre axis, and a second thread part with an external thread screwed into the internal thread on the first thread part, and
• wherein a length that the internal thread of the first thread part extends along the first thread part is at least twice as long as a length that the external thread of the second thread part extends along the second thread part;
• wherein a slot is provided within the external thread of the second thread part, said slot extending longitudinally through and within said external thread of said second thread part such that the external thread is split into two halves with the slot enclosed there-between, the two halves of the external thread being connected to one another on both ends of the slot and capable of being shifted elastically in a direction towards or away from each other, and
• wherein the internal thread on the first thread part has a thread length which is longer than a total stroke length of the linear actuator.