Abstract: The invention relates to interlocking building blocks for changeable modular assemblies. The set of interlocking building blocks consists of a female block (1) and a set of male blocks (2-5), wherein the female block (1) has rectangular indentations (7) and the male blocks (2-5) fit inside the rectangular indentations (7) of female blocks (1), so that a female block (1) may simultaneously fit in its rectangular indentations (7) two male blocks (2-5), and a male block (2-5) may simultaneously fit inside at least two female blocks (1). In that way, each male block (2-5) simultaneously fills in at least half the rectangular indentations (7) of at least two female blocks (1) and thus fixedly connects said at least two female blocks (1). The set of interlocking building blocks further comprises a terminal block (6) to fill in empty spaces and provide straight edges on the assembly, and a filling block (11) to extend the assembly eight, width or length.

Abstract: The invention relates to interlocking building blocks for changeable modular assemblies. The set of interlocking building blocks consists of a female block (1) and a set of male blocks (2-5), wherein the female block (1) has rectangular indentations (7) and the male blocks (2-5) fit inside the rectangular indentations (7) of female blocks (1), so that a female block (1) may simultaneously fit in its rectangular indentations (7) two male blocks (2-5), and a male block (2-5) may simultaneously fit inside at least two female blocks (1). In that way, each male block (2-5) simultaneously fills in at least half the rectangular indentations (7) of at least two female blocks (1) and thus fixedly connects said at least two female blocks (1). The set of interlocking building blocks further comprises a terminal block (6) to fill in empty spaces and provide straight edges on the assembly, and a filling block (11) to extend the assembly eight, width or length.