Modular Construction System

A modular construction system, comprising:

• a main connector having a body and a hole, wherein the hole is radially disposed about the body;
• a rod having a rod main connector end, a rod tubular body, a rod insertion end, and a rod hollow chamber traversing the rod from the rod main connector end through the rod tubular body and through the rod insertion end, and wherein the rod main connector end is releasably engaged to the hole;
• and,
• a plurality of main bars, each of the main bars having a first receiving end, a main bar tubular body, a second receiving end, a main bar hollow chamber traversing the main bar from the first receiving end through the main bar tubular body to the second receiving end, at least three main bar longitudinal sides, a plurality of apertures on the main bar longitudinal sides, and at least three main bar grooves between adjacent main bar longitudinal sides, and the main bar grooves being parallel with the main bar tubular body and the main bar hollow chamber;
• and, wherein the rod insertion end being adapted to be fitted into the receiving ends.