Molded brick module

A molded brick module integrally formed from molded plastic material, comprising two opposite outer surface portions and a middle connecting portion extending between said two surface portions, said surface portions each being integrally formed from an outer stratum and an inner stratum, said outer stratum offsetting from said inner stratum, such that a first pair of adjacent edges of said outer stratum project beyond a corresponding first pair of adjacent edges of said inner stratum, and a second pair of adjacent edges of said outer stratum withdraw from a corresponding second pair of adjacent edges of said inner stratum, whereby, two molded brick modules may be fitted together by engaging said projected edges on one of said molded brick modules with corresponding withdrawn edges on another said molded brick module;

• cylinders with insertion holes being symmetrically provided on inner sides of said inner strata;
• and said connecting portion including a central connecting circle and two connecting semicircles near two outer ends of said molded brick module and having a concavo-concave cross section which makes said connecting circle and said connecting semicircles have inward curved upper and lower edges.