"tho..tho..tho.."

Rayyan climbs on the sofa, holds on to mama's hand and chants 'tho..tho..tho..' till he is assisted to jump down from the sofa (in true action-hero style). The 'tho..tho..tho..' is part of the '1.. tho.. 3.." run-up to the jump. And you would think that math has to be learnt in the sequential order of 1,2,3,4,5....