A first modular toy construction element comprising a first electrical connector element, the first electrical connector element comprising - a first connector part comprising a first plurality of electrical contacts electrically connected to a first plurality of electrical conductors, wherein the first electrical connector element is adapted to be mechanically, electrically, and releasably connected with a second electrical connector element of a second modular toy construction element, and wherein the first electrical connector element further comprises - a strain relief part adapted to securely hold the first plurality of electrical conductors thereby securing the first plurality of electrical conductors to or in the first electrical connector element, and - a number of lock and release elements adapted to be received and releasably engage with an opening of the second electrical connector element when the first and the second electrical connector elements (100; 200) are mechanically and electrically coupled together, and wherein the number of lock and release elements and the opening - are adapted to releasably locking a coupling between the first and the second electrical connector elements (100; 200) when the first and the second electrical connector elements (100; 200) are mechanically and electrically coupled together, characterised in that the number of lock and release elements and the opening are - further adapted to release the coupling between the first and the second electrical connector elements (100; 200) when the first and/or the second electrical connector element(s) (100; 200) is/are subjected to one or more pull forces above a predetermined release threshold. - a first connector part comprising a first plurality of electrical contacts electrically connected to a first plurality of electrical conductors, wherein the first electrical connector element is adapted to be mechanically, electrically, and releasably connected with a second electrical connector element of a second modular toy construction element, and wherein the first electrical connector element further comprises wherein the first electrical connector element is adapted to be mechanically, electrically, and releasably connected with a second electrical connector element of a second modular toy construction element, and wherein the first electrical connector element further comprises - a strain relief part adapted to securely hold the first plurality of electrical conductors thereby securing the first plurality of electrical conductors to or in the first electrical connector element, and - a number of lock and release elements adapted to be received and releasably engage with an opening of the second electrical connector element when the first and the second electrical connector elements (100; 200) are mechanically and electrically coupled together, and wherein the number of lock and release elements and the opening - are adapted to releasably locking a coupling between the first and the second electrical connector elements (100; 200) when the first and the second electrical connector elements (100; 200) are mechanically and electrically coupled together, characterised in that the number of lock and release elements and the opening are - further adapted to release the coupling between the first and the second electrical connector elements (100; 200) when the first and/or the second electrical connector element(s) (100; 200) is/are subjected to one or more pull forces above a predetermined release threshold.