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1 He/she will likely be using a step-to pattern in which he/she places both feet on each step. 2  18-20 months-By the time your child is this age, he/she should be able to walk down the stairs as well, placing both feet on each step and using a railing for support.
The average flight of stairs has 12 steps. An average person burns approximately 0.15 calories for every step while climbing up and 0.05 calories while climbing down. Climb 250 steps up and down, you can burn upto 50 calories.