The ENGINO TOY SYSTEM is ideal for building large open frame structures due to the versatile design of the parts which allows simultaneous building in almost all directions of the 3D space. This is enhanced by the unique patented extendable rods, which in combination with the variable angle connectors can lead to the creation of any triangular shape, not restricted by 45 or 90 degrees as with most conventional construction systems! The MEGA STRUCTURES TUB features a 150 cm tall Eiffel Tower and a 144 cm model of the Sydney Bridge whose step by step instructions are presented in a CD. The colors of the parts are the same as the usual engino colors so that modelers can follow the free internet instructions and build even more models! Suitable for a group of students and most appropriate for late Primary and early Secondary schools.