What is the best way to baby proof our stairs?

Gates are easy: Putting up a gate at the top and the bottom of the stairs will prevent your baby from either falling down or climbing up (and then falling down!).

Baby gate: Invest in a good baby gate to avoid the infant from falling down the steps.

Block them: Toddler gaits on each end. Make sure the uprights are close enough so the child's head and body cannot fall through. If they are too wide, cover with netting.