Kids Having Fun In Abacus Online Class An abacus enables kids to calculate using an abacus rod. This rod has a rectangular frame with several vertical rods present within it. Each of the rods contains a certain number of beads that can be moved up and down. An abacus is also divided into an upper section and a lower section.Learning to use the abacus enables kids to enhance their skill for doing mental calculations. Thus, they can add, subtract, multip